./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:13:03,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:13:03,334 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:13:03,339 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:13:03,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:13:03,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:13:03,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:13:03,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:13:03,372 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:13:03,375 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:13:03,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:13:03,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:13:03,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:13:03,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:13:03,377 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:13:03,377 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:13:03,377 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:13:03,378 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:13:03,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:13:03,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:13:03,378 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:13:03,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:13:03,379 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:13:03,379 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:13:03,379 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:13:03,379 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:13:03,380 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:13:03,380 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:13:03,380 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:13:03,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:13:03,381 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:13:03,382 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:13:03,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:03,382 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:13:03,382 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:13:03,382 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:13:03,382 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:13:03,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:13:03,383 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:13:03,383 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:13:03,383 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:13:03,383 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:13:03,384 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:13:03,384 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:13:03,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:13:03,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:13:03,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:13:03,649 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:13:03,650 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:13:03,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:04,789 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:13:05,031 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:13:05,031 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:05,048 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c7a19f4/17fa15b5469d4f2a8ec79c8c6eea8119/FLAG792607c69 [2024-06-21 18:13:05,063 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c7a19f4/17fa15b5469d4f2a8ec79c8c6eea8119 [2024-06-21 18:13:05,065 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:13:05,065 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:13:05,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 18:13:05,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:13:05,182 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:13:05,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:05,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:13:05,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:13:05,189 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:05" (1/2) ... [2024-06-21 18:13:05,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279153c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:05, skipping insertion in model container [2024-06-21 18:13:05,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:05" (1/2) ... [2024-06-21 18:13:05,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f88c34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:05, skipping insertion in model container [2024-06-21 18:13:05,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:05" (2/2) ... [2024-06-21 18:13:05,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279153c8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05, skipping insertion in model container [2024-06-21 18:13:05,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:05" (2/2) ... [2024-06-21 18:13:05,194 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:13:05,214 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:13:05,215 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ! multithreaded || ((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-21 18:13:05,216 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ! multithreaded || ((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-21 18:13:05,216 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ! multithreaded || ((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-21 18:13:05,216 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:13:05,216 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-21 18:13:05,257 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:13:05,512 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:05,522 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:13:05,634 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:05,669 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:13:05,670 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05 WrapperNode [2024-06-21 18:13:05,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:05,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:05,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:13:05,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:13:05,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,725 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 18:13:05,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:05,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:13:05,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:13:05,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:13:05,735 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,738 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,761 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:13:05,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,763 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,776 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,779 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:13:05,780 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:13:05,780 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:13:05,780 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:13:05,781 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (1/1) ... [2024-06-21 18:13:05,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:05,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:13:05,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:13:05,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:13:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:13:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:13:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:13:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:13:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:13:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:13:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:13:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:13:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:13:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:13:05,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:13:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:13:05,855 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:13:06,005 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:13:06,008 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:13:06,182 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:13:06,182 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:13:06,340 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:13:06,349 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:13:06,350 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:06 BoogieIcfgContainer [2024-06-21 18:13:06,350 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:13:06,361 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:13:06,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:13:06,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:13:06,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:13:05" (1/4) ... [2024-06-21 18:13:06,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9de32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:13:06, skipping insertion in model container [2024-06-21 18:13:06,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:05" (2/4) ... [2024-06-21 18:13:06,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9de32f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:13:06, skipping insertion in model container [2024-06-21 18:13:06,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:05" (3/4) ... [2024-06-21 18:13:06,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9de32f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:13:06, skipping insertion in model container [2024-06-21 18:13:06,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:06" (4/4) ... [2024-06-21 18:13:06,378 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:06,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:13:06,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:13:06,403 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:13:06,485 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:13:06,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 18:13:06,562 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-21 18:13:06,584 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:06,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:13:06,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 18:13:06,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-21 18:13:06,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:13:06,621 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69f9de7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:13:06,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:13:06,625 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:13:06,637 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:13:06,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:06,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:06,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:13:06,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:06,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:06,643 INFO L85 PathProgramCache]: Analyzing trace with hash 215575840, now seen corresponding path program 1 times [2024-06-21 18:13:06,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:06,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044126496] [2024-06-21 18:13:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:07,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:07,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044126496] [2024-06-21 18:13:07,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044126496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:07,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:07,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:13:07,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3766807] [2024-06-21 18:13:07,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:07,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:13:07,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:13:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:13:07,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-06-21 18:13:07,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:07,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:07,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-06-21 18:13:07,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:07,251 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-21 18:13:07,252 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 18:13:07,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 807 events. 471/807 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3895 event pairs, 288 based on Foata normal form. 1/787 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-21 18:13:07,264 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 27 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-06-21 18:13:07,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 157 flow [2024-06-21 18:13:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:13:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:13:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-21 18:13:07,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-21 18:13:07,275 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 82 transitions. [2024-06-21 18:13:07,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 157 flow [2024-06-21 18:13:07,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 152 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:07,280 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 96 flow [2024-06-21 18:13:07,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-21 18:13:07,285 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-06-21 18:13:07,285 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 96 flow [2024-06-21 18:13:07,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:07,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:07,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:07,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:13:07,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:07,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1277271903, now seen corresponding path program 1 times [2024-06-21 18:13:07,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:07,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27885876] [2024-06-21 18:13:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:07,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:07,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27885876] [2024-06-21 18:13:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27885876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:07,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:07,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:07,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518852386] [2024-06-21 18:13:07,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:07,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:07,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:07,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:07,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:07,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:07,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:07,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:07,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:07,695 INFO L124 PetriNetUnfolderBase]: 754/1254 cut-off events. [2024-06-21 18:13:07,696 INFO L125 PetriNetUnfolderBase]: For 194/196 co-relation queries the response was YES. [2024-06-21 18:13:07,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2856 conditions, 1254 events. 754/1254 cut-off events. For 194/196 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6109 event pairs, 318 based on Foata normal form. 5/1258 useless extension candidates. Maximal degree in co-relation 2844. Up to 1124 conditions per place. [2024-06-21 18:13:07,714 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 18:13:07,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 248 flow [2024-06-21 18:13:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 18:13:07,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-21 18:13:07,716 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 96 flow. Second operand 4 states and 103 transitions. [2024-06-21 18:13:07,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 248 flow [2024-06-21 18:13:07,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:07,717 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 148 flow [2024-06-21 18:13:07,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-21 18:13:07,718 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-06-21 18:13:07,718 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 148 flow [2024-06-21 18:13:07,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:07,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:07,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:07,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:13:07,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:07,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:07,719 INFO L85 PathProgramCache]: Analyzing trace with hash -902335586, now seen corresponding path program 1 times [2024-06-21 18:13:07,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:07,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462539710] [2024-06-21 18:13:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:07,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:07,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:07,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462539710] [2024-06-21 18:13:07,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462539710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:07,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:07,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:07,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151793449] [2024-06-21 18:13:07,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:07,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:07,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:07,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:07,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:07,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:07,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:07,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:07,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:08,067 INFO L124 PetriNetUnfolderBase]: 745/1239 cut-off events. [2024-06-21 18:13:08,067 INFO L125 PetriNetUnfolderBase]: For 580/588 co-relation queries the response was YES. [2024-06-21 18:13:08,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 1239 events. 745/1239 cut-off events. For 580/588 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6017 event pairs, 218 based on Foata normal form. 14/1252 useless extension candidates. Maximal degree in co-relation 3155. Up to 1079 conditions per place. [2024-06-21 18:13:08,076 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 44 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-21 18:13:08,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 308 flow [2024-06-21 18:13:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 18:13:08,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 18:13:08,085 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 148 flow. Second operand 5 states and 123 transitions. [2024-06-21 18:13:08,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 308 flow [2024-06-21 18:13:08,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 306 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:08,087 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 179 flow [2024-06-21 18:13:08,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-21 18:13:08,087 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-06-21 18:13:08,088 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 179 flow [2024-06-21 18:13:08,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:08,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:08,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:08,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:13:08,088 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:08,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1632488695, now seen corresponding path program 1 times [2024-06-21 18:13:08,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:08,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106825132] [2024-06-21 18:13:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:08,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:08,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:08,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106825132] [2024-06-21 18:13:08,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106825132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:08,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:08,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:08,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166856324] [2024-06-21 18:13:08,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:08,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:08,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:08,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:08,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:08,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:08,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:08,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:08,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:08,377 INFO L124 PetriNetUnfolderBase]: 747/1228 cut-off events. [2024-06-21 18:13:08,378 INFO L125 PetriNetUnfolderBase]: For 1101/1103 co-relation queries the response was YES. [2024-06-21 18:13:08,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1228 events. 747/1228 cut-off events. For 1101/1103 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5857 event pairs, 254 based on Foata normal form. 5/1229 useless extension candidates. Maximal degree in co-relation 3411. Up to 1105 conditions per place. [2024-06-21 18:13:08,386 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 18:13:08,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 387 flow [2024-06-21 18:13:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 18:13:08,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-21 18:13:08,388 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 179 flow. Second operand 4 states and 102 transitions. [2024-06-21 18:13:08,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 387 flow [2024-06-21 18:13:08,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 362 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:08,391 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-21 18:13:08,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-21 18:13:08,392 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-06-21 18:13:08,392 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-21 18:13:08,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:08,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:08,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:13:08,393 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:08,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2101841614, now seen corresponding path program 1 times [2024-06-21 18:13:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:08,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166212852] [2024-06-21 18:13:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:08,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166212852] [2024-06-21 18:13:08,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166212852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:08,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:08,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:08,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944342120] [2024-06-21 18:13:08,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:08,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:08,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:08,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:08,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:08,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:08,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:08,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:08,645 INFO L124 PetriNetUnfolderBase]: 758/1285 cut-off events. [2024-06-21 18:13:08,645 INFO L125 PetriNetUnfolderBase]: For 1862/1874 co-relation queries the response was YES. [2024-06-21 18:13:08,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4008 conditions, 1285 events. 758/1285 cut-off events. For 1862/1874 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6408 event pairs, 280 based on Foata normal form. 14/1298 useless extension candidates. Maximal degree in co-relation 3988. Up to 1085 conditions per place. [2024-06-21 18:13:08,652 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 18:13:08,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 484 flow [2024-06-21 18:13:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 18:13:08,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-21 18:13:08,654 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 5 states and 126 transitions. [2024-06-21 18:13:08,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 484 flow [2024-06-21 18:13:08,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 478 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:08,658 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 315 flow [2024-06-21 18:13:08,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-06-21 18:13:08,659 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-06-21 18:13:08,659 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 315 flow [2024-06-21 18:13:08,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:08,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:08,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:08,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:13:08,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:08,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:08,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1897587144, now seen corresponding path program 1 times [2024-06-21 18:13:08,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:08,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261838832] [2024-06-21 18:13:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:08,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:08,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261838832] [2024-06-21 18:13:08,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261838832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:08,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:08,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68419340] [2024-06-21 18:13:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:08,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:08,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 315 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:08,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:08,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:08,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:08,956 INFO L124 PetriNetUnfolderBase]: 800/1331 cut-off events. [2024-06-21 18:13:08,956 INFO L125 PetriNetUnfolderBase]: For 2808/2820 co-relation queries the response was YES. [2024-06-21 18:13:08,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1331 events. 800/1331 cut-off events. For 2808/2820 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6563 event pairs, 253 based on Foata normal form. 15/1345 useless extension candidates. Maximal degree in co-relation 4535. Up to 1123 conditions per place. [2024-06-21 18:13:08,964 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 48 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2024-06-21 18:13:08,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 554 flow [2024-06-21 18:13:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 18:13:08,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 18:13:08,965 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 315 flow. Second operand 5 states and 123 transitions. [2024-06-21 18:13:08,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 554 flow [2024-06-21 18:13:08,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 531 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:08,971 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 427 flow [2024-06-21 18:13:08,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-06-21 18:13:08,971 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-06-21 18:13:08,972 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 427 flow [2024-06-21 18:13:08,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:08,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:08,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:08,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:13:08,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:08,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1897586958, now seen corresponding path program 2 times [2024-06-21 18:13:08,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:08,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989952187] [2024-06-21 18:13:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:08,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:09,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:09,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989952187] [2024-06-21 18:13:09,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989952187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:09,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:09,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563146669] [2024-06-21 18:13:09,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:09,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:09,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:09,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:09,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:09,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:09,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:09,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:09,240 INFO L124 PetriNetUnfolderBase]: 795/1342 cut-off events. [2024-06-21 18:13:09,240 INFO L125 PetriNetUnfolderBase]: For 4227/4241 co-relation queries the response was YES. [2024-06-21 18:13:09,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 1342 events. 795/1342 cut-off events. For 4227/4241 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6707 event pairs, 271 based on Foata normal form. 16/1357 useless extension candidates. Maximal degree in co-relation 5126. Up to 1148 conditions per place. [2024-06-21 18:13:09,248 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 58 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-21 18:13:09,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 605 flow [2024-06-21 18:13:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 18:13:09,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-21 18:13:09,249 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 427 flow. Second operand 4 states and 103 transitions. [2024-06-21 18:13:09,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 605 flow [2024-06-21 18:13:09,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 578 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:09,256 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 438 flow [2024-06-21 18:13:09,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2024-06-21 18:13:09,257 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-06-21 18:13:09,257 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 438 flow [2024-06-21 18:13:09,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:09,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:09,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:09,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:13:09,258 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:09,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:09,258 INFO L85 PathProgramCache]: Analyzing trace with hash -687550554, now seen corresponding path program 2 times [2024-06-21 18:13:09,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:09,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837118711] [2024-06-21 18:13:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:09,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:09,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:09,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837118711] [2024-06-21 18:13:09,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837118711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:09,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:09,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:09,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360181967] [2024-06-21 18:13:09,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:09,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:09,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:09,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:09,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:09,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:09,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:09,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:09,505 INFO L124 PetriNetUnfolderBase]: 805/1335 cut-off events. [2024-06-21 18:13:09,506 INFO L125 PetriNetUnfolderBase]: For 4916/4930 co-relation queries the response was YES. [2024-06-21 18:13:09,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5341 conditions, 1335 events. 805/1335 cut-off events. For 4916/4930 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6573 event pairs, 267 based on Foata normal form. 17/1345 useless extension candidates. Maximal degree in co-relation 5313. Up to 1092 conditions per place. [2024-06-21 18:13:09,514 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 55 selfloop transitions, 31 changer transitions 0/93 dead transitions. [2024-06-21 18:13:09,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 764 flow [2024-06-21 18:13:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 18:13:09,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512820512820513 [2024-06-21 18:13:09,515 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 438 flow. Second operand 5 states and 127 transitions. [2024-06-21 18:13:09,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 764 flow [2024-06-21 18:13:09,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 726 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:09,523 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 582 flow [2024-06-21 18:13:09,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-21 18:13:09,524 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2024-06-21 18:13:09,524 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 582 flow [2024-06-21 18:13:09,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:09,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:09,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:09,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:13:09,525 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:09,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:09,525 INFO L85 PathProgramCache]: Analyzing trace with hash -687541626, now seen corresponding path program 1 times [2024-06-21 18:13:09,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:09,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258665666] [2024-06-21 18:13:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:09,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:09,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258665666] [2024-06-21 18:13:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258665666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:09,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:09,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:09,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942740606] [2024-06-21 18:13:09,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:09,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:09,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:09,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:09,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:09,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:09,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:09,902 INFO L124 PetriNetUnfolderBase]: 835/1398 cut-off events. [2024-06-21 18:13:09,916 INFO L125 PetriNetUnfolderBase]: For 5763/5769 co-relation queries the response was YES. [2024-06-21 18:13:09,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5897 conditions, 1398 events. 835/1398 cut-off events. For 5763/5769 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6980 event pairs, 242 based on Foata normal form. 18/1412 useless extension candidates. Maximal degree in co-relation 5867. Up to 1175 conditions per place. [2024-06-21 18:13:09,925 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 81 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-21 18:13:09,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 892 flow [2024-06-21 18:13:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 18:13:09,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-21 18:13:09,926 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 582 flow. Second operand 5 states and 126 transitions. [2024-06-21 18:13:09,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 892 flow [2024-06-21 18:13:09,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 856 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:09,948 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 606 flow [2024-06-21 18:13:09,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=606, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-21 18:13:09,949 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2024-06-21 18:13:09,949 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 606 flow [2024-06-21 18:13:09,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:09,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:09,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:09,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:13:09,950 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:09,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1548956050, now seen corresponding path program 1 times [2024-06-21 18:13:09,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:09,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436960818] [2024-06-21 18:13:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:10,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436960818] [2024-06-21 18:13:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436960818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:10,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:10,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280151506] [2024-06-21 18:13:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:10,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:10,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 606 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:10,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:10,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:10,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:10,397 INFO L124 PetriNetUnfolderBase]: 760/1286 cut-off events. [2024-06-21 18:13:10,397 INFO L125 PetriNetUnfolderBase]: For 5934/5939 co-relation queries the response was YES. [2024-06-21 18:13:10,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1286 events. 760/1286 cut-off events. For 5934/5939 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6465 event pairs, 246 based on Foata normal form. 6/1273 useless extension candidates. Maximal degree in co-relation 5373. Up to 1115 conditions per place. [2024-06-21 18:13:10,407 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 64 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-21 18:13:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 799 flow [2024-06-21 18:13:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 18:13:10,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:13:10,408 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 606 flow. Second operand 4 states and 96 transitions. [2024-06-21 18:13:10,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 799 flow [2024-06-21 18:13:10,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 765 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:10,416 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 641 flow [2024-06-21 18:13:10,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=641, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-06-21 18:13:10,416 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-06-21 18:13:10,417 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 641 flow [2024-06-21 18:13:10,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:10,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:10,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:10,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:13:10,417 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:10,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:10,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1616664564, now seen corresponding path program 1 times [2024-06-21 18:13:10,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:10,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591523279] [2024-06-21 18:13:10,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:10,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:10,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:10,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591523279] [2024-06-21 18:13:10,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591523279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:10,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:10,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:10,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072578591] [2024-06-21 18:13:10,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:10,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:10,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:10,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:10,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:10,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 641 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:10,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:10,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:10,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:10,748 INFO L124 PetriNetUnfolderBase]: 886/1493 cut-off events. [2024-06-21 18:13:10,748 INFO L125 PetriNetUnfolderBase]: For 6894/6908 co-relation queries the response was YES. [2024-06-21 18:13:10,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6281 conditions, 1493 events. 886/1493 cut-off events. For 6894/6908 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7648 event pairs, 249 based on Foata normal form. 17/1509 useless extension candidates. Maximal degree in co-relation 6244. Up to 1152 conditions per place. [2024-06-21 18:13:10,758 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 80 selfloop transitions, 42 changer transitions 0/129 dead transitions. [2024-06-21 18:13:10,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 1155 flow [2024-06-21 18:13:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 18:13:10,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6210826210826211 [2024-06-21 18:13:10,761 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 641 flow. Second operand 9 states and 218 transitions. [2024-06-21 18:13:10,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 1155 flow [2024-06-21 18:13:10,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 1145 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:10,771 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 837 flow [2024-06-21 18:13:10,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=837, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-06-21 18:13:10,771 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-21 18:13:10,771 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 837 flow [2024-06-21 18:13:10,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:10,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:10,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:10,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:13:10,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:10,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:10,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1304345368, now seen corresponding path program 2 times [2024-06-21 18:13:10,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:10,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991615192] [2024-06-21 18:13:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:10,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:10,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991615192] [2024-06-21 18:13:10,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991615192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:10,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:10,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:10,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300501529] [2024-06-21 18:13:10,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:10,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:10,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:10,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:10,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:10,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 837 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:10,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:10,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:10,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:11,282 INFO L124 PetriNetUnfolderBase]: 904/1527 cut-off events. [2024-06-21 18:13:11,283 INFO L125 PetriNetUnfolderBase]: For 9416/9430 co-relation queries the response was YES. [2024-06-21 18:13:11,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7122 conditions, 1527 events. 904/1527 cut-off events. For 9416/9430 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7894 event pairs, 251 based on Foata normal form. 17/1543 useless extension candidates. Maximal degree in co-relation 7081. Up to 1204 conditions per place. [2024-06-21 18:13:11,309 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 82 selfloop transitions, 34 changer transitions 0/123 dead transitions. [2024-06-21 18:13:11,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1270 flow [2024-06-21 18:13:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 18:13:11,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-21 18:13:11,311 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 837 flow. Second operand 6 states and 155 transitions. [2024-06-21 18:13:11,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1270 flow [2024-06-21 18:13:11,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 1173 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:11,334 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 891 flow [2024-06-21 18:13:11,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=891, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-21 18:13:11,349 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-21 18:13:11,349 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 891 flow [2024-06-21 18:13:11,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:11,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:11,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:11,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:13:11,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:11,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1304339788, now seen corresponding path program 3 times [2024-06-21 18:13:11,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:11,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806550455] [2024-06-21 18:13:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:11,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:11,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806550455] [2024-06-21 18:13:11,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806550455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:11,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:11,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:11,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149151025] [2024-06-21 18:13:11,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:11,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:11,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:11,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:11,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:11,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:11,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 891 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:11,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:11,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:11,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:11,767 INFO L124 PetriNetUnfolderBase]: 906/1532 cut-off events. [2024-06-21 18:13:11,768 INFO L125 PetriNetUnfolderBase]: For 10820/10834 co-relation queries the response was YES. [2024-06-21 18:13:11,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7419 conditions, 1532 events. 906/1532 cut-off events. For 10820/10834 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7927 event pairs, 250 based on Foata normal form. 17/1548 useless extension candidates. Maximal degree in co-relation 7375. Up to 1209 conditions per place. [2024-06-21 18:13:11,779 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 81 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-21 18:13:11,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1309 flow [2024-06-21 18:13:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 18:13:11,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 18:13:11,781 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 891 flow. Second operand 8 states and 195 transitions. [2024-06-21 18:13:11,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1309 flow [2024-06-21 18:13:11,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1234 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:11,804 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 959 flow [2024-06-21 18:13:11,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-21 18:13:11,805 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-06-21 18:13:11,805 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 959 flow [2024-06-21 18:13:11,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:11,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:11,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:11,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:13:11,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:11,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 160770198, now seen corresponding path program 4 times [2024-06-21 18:13:11,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:11,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253862085] [2024-06-21 18:13:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:11,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:11,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:11,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253862085] [2024-06-21 18:13:11,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253862085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:11,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:11,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:11,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722419173] [2024-06-21 18:13:11,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:11,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:11,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:11,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:11,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:11,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:11,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 959 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:11,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:11,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:11,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:12,363 INFO L124 PetriNetUnfolderBase]: 930/1568 cut-off events. [2024-06-21 18:13:12,376 INFO L125 PetriNetUnfolderBase]: For 12711/12725 co-relation queries the response was YES. [2024-06-21 18:13:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7765 conditions, 1568 events. 930/1568 cut-off events. For 12711/12725 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8133 event pairs, 255 based on Foata normal form. 17/1578 useless extension candidates. Maximal degree in co-relation 7720. Up to 1171 conditions per place. [2024-06-21 18:13:12,388 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 80 selfloop transitions, 60 changer transitions 0/147 dead transitions. [2024-06-21 18:13:12,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1541 flow [2024-06-21 18:13:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 18:13:12,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:12,405 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 959 flow. Second operand 8 states and 200 transitions. [2024-06-21 18:13:12,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1541 flow [2024-06-21 18:13:12,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 147 transitions, 1437 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:12,435 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 1131 flow [2024-06-21 18:13:12,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1131, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2024-06-21 18:13:12,435 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-21 18:13:12,436 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 1131 flow [2024-06-21 18:13:12,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:12,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:12,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:12,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:13:12,436 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:12,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1068728269, now seen corresponding path program 1 times [2024-06-21 18:13:12,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:12,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415285168] [2024-06-21 18:13:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:12,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415285168] [2024-06-21 18:13:12,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415285168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:12,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:12,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:12,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219105997] [2024-06-21 18:13:12,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:12,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:12,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:12,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:12,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 1131 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:12,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:12,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:12,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:12,794 INFO L124 PetriNetUnfolderBase]: 947/1597 cut-off events. [2024-06-21 18:13:12,794 INFO L125 PetriNetUnfolderBase]: For 15696/15710 co-relation queries the response was YES. [2024-06-21 18:13:12,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8497 conditions, 1597 events. 947/1597 cut-off events. For 15696/15710 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8306 event pairs, 164 based on Foata normal form. 18/1614 useless extension candidates. Maximal degree in co-relation 8450. Up to 1278 conditions per place. [2024-06-21 18:13:12,806 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 112 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2024-06-21 18:13:12,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 1591 flow [2024-06-21 18:13:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 18:13:12,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 18:13:12,808 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 1131 flow. Second operand 6 states and 148 transitions. [2024-06-21 18:13:12,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 1591 flow [2024-06-21 18:13:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 142 transitions, 1491 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:12,830 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 1164 flow [2024-06-21 18:13:12,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1164, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-21 18:13:12,831 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 57 predicate places. [2024-06-21 18:13:12,831 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 1164 flow [2024-06-21 18:13:12,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:12,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:12,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:12,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:13:12,832 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:12,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1068788719, now seen corresponding path program 2 times [2024-06-21 18:13:12,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:12,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251916329] [2024-06-21 18:13:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:12,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251916329] [2024-06-21 18:13:12,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251916329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:12,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826061453] [2024-06-21 18:13:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:12,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:12,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:12,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:12,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:12,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 1164 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:12,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:12,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:12,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:13,171 INFO L124 PetriNetUnfolderBase]: 964/1624 cut-off events. [2024-06-21 18:13:13,172 INFO L125 PetriNetUnfolderBase]: For 17589/17603 co-relation queries the response was YES. [2024-06-21 18:13:13,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8835 conditions, 1624 events. 964/1624 cut-off events. For 17589/17603 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8454 event pairs, 235 based on Foata normal form. 18/1641 useless extension candidates. Maximal degree in co-relation 8786. Up to 1369 conditions per place. [2024-06-21 18:13:13,184 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2024-06-21 18:13:13,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 141 transitions, 1532 flow [2024-06-21 18:13:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 18:13:13,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-06-21 18:13:13,185 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 1164 flow. Second operand 6 states and 145 transitions. [2024-06-21 18:13:13,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 141 transitions, 1532 flow [2024-06-21 18:13:13,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1455 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:13,253 INFO L231 Difference]: Finished difference. Result has 101 places, 118 transitions, 1180 flow [2024-06-21 18:13:13,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1180, PETRI_PLACES=101, PETRI_TRANSITIONS=118} [2024-06-21 18:13:13,254 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 61 predicate places. [2024-06-21 18:13:13,254 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 118 transitions, 1180 flow [2024-06-21 18:13:13,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:13,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:13,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:13:13,255 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:13,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1780004595, now seen corresponding path program 3 times [2024-06-21 18:13:13,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:13,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74513666] [2024-06-21 18:13:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:13,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:13,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:13,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74513666] [2024-06-21 18:13:13,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74513666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:13,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:13,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:13,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260554753] [2024-06-21 18:13:13,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:13,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:13,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:13,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:13,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:13,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:13,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 118 transitions, 1180 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:13,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:13,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:13,610 INFO L124 PetriNetUnfolderBase]: 956/1612 cut-off events. [2024-06-21 18:13:13,611 INFO L125 PetriNetUnfolderBase]: For 18293/18307 co-relation queries the response was YES. [2024-06-21 18:13:13,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 1612 events. 956/1612 cut-off events. For 18293/18307 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8380 event pairs, 162 based on Foata normal form. 18/1629 useless extension candidates. Maximal degree in co-relation 8647. Up to 1336 conditions per place. [2024-06-21 18:13:13,623 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 111 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-06-21 18:13:13,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1488 flow [2024-06-21 18:13:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 18:13:13,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:13,625 INFO L175 Difference]: Start difference. First operand has 101 places, 118 transitions, 1180 flow. Second operand 5 states and 125 transitions. [2024-06-21 18:13:13,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1488 flow [2024-06-21 18:13:13,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 137 transitions, 1409 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:13,651 INFO L231 Difference]: Finished difference. Result has 102 places, 118 transitions, 1149 flow [2024-06-21 18:13:13,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1149, PETRI_PLACES=102, PETRI_TRANSITIONS=118} [2024-06-21 18:13:13,652 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 62 predicate places. [2024-06-21 18:13:13,652 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 118 transitions, 1149 flow [2024-06-21 18:13:13,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:13,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:13,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:13:13,653 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:13,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:13,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1779819897, now seen corresponding path program 1 times [2024-06-21 18:13:13,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:13,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637700108] [2024-06-21 18:13:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:13,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637700108] [2024-06-21 18:13:13,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637700108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:13,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:13,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721919493] [2024-06-21 18:13:13,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:13,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:13,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:13,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 118 transitions, 1149 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:13,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:13,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:13,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:14,059 INFO L124 PetriNetUnfolderBase]: 1011/1699 cut-off events. [2024-06-21 18:13:14,060 INFO L125 PetriNetUnfolderBase]: For 20926/20940 co-relation queries the response was YES. [2024-06-21 18:13:14,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9086 conditions, 1699 events. 1011/1699 cut-off events. For 20926/20940 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8876 event pairs, 213 based on Foata normal form. 26/1724 useless extension candidates. Maximal degree in co-relation 9034. Up to 1334 conditions per place. [2024-06-21 18:13:14,073 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 106 selfloop transitions, 29 changer transitions 0/142 dead transitions. [2024-06-21 18:13:14,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1559 flow [2024-06-21 18:13:14,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 18:13:14,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 18:13:14,075 INFO L175 Difference]: Start difference. First operand has 102 places, 118 transitions, 1149 flow. Second operand 6 states and 148 transitions. [2024-06-21 18:13:14,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1559 flow [2024-06-21 18:13:14,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 1514 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:14,103 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1210 flow [2024-06-21 18:13:14,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1210, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2024-06-21 18:13:14,104 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 64 predicate places. [2024-06-21 18:13:14,104 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1210 flow [2024-06-21 18:13:14,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:14,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:14,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:14,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:13:14,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:14,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:14,105 INFO L85 PathProgramCache]: Analyzing trace with hash 456638719, now seen corresponding path program 1 times [2024-06-21 18:13:14,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:14,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24873878] [2024-06-21 18:13:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:14,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:14,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24873878] [2024-06-21 18:13:14,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24873878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:14,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:14,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770881499] [2024-06-21 18:13:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:14,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:14,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:14,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:14,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1210 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:14,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:14,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:14,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:14,427 INFO L124 PetriNetUnfolderBase]: 937/1588 cut-off events. [2024-06-21 18:13:14,427 INFO L125 PetriNetUnfolderBase]: For 21123/21130 co-relation queries the response was YES. [2024-06-21 18:13:14,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8819 conditions, 1588 events. 937/1588 cut-off events. For 21123/21130 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8348 event pairs, 214 based on Foata normal form. 8/1578 useless extension candidates. Maximal degree in co-relation 8766. Up to 1337 conditions per place. [2024-06-21 18:13:14,438 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 94 selfloop transitions, 25 changer transitions 0/132 dead transitions. [2024-06-21 18:13:14,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 132 transitions, 1478 flow [2024-06-21 18:13:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 18:13:14,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-21 18:13:14,439 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1210 flow. Second operand 5 states and 123 transitions. [2024-06-21 18:13:14,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 132 transitions, 1478 flow [2024-06-21 18:13:14,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 132 transitions, 1398 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:14,466 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1196 flow [2024-06-21 18:13:14,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1196, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-21 18:13:14,466 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-21 18:13:14,466 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1196 flow [2024-06-21 18:13:14,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:14,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:14,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:14,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:13:14,467 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:14,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash 3267399, now seen corresponding path program 2 times [2024-06-21 18:13:14,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:14,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879179413] [2024-06-21 18:13:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:14,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:14,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879179413] [2024-06-21 18:13:14,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879179413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:14,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:14,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:14,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897404018] [2024-06-21 18:13:14,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:14,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:14,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:14,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:14,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:14,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1196 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:14,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:14,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:14,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:14,797 INFO L124 PetriNetUnfolderBase]: 1033/1728 cut-off events. [2024-06-21 18:13:14,798 INFO L125 PetriNetUnfolderBase]: For 24598/24612 co-relation queries the response was YES. [2024-06-21 18:13:14,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9439 conditions, 1728 events. 1033/1728 cut-off events. For 24598/24612 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9022 event pairs, 244 based on Foata normal form. 26/1747 useless extension candidates. Maximal degree in co-relation 9385. Up to 1402 conditions per place. [2024-06-21 18:13:14,810 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 108 selfloop transitions, 33 changer transitions 0/148 dead transitions. [2024-06-21 18:13:14,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1672 flow [2024-06-21 18:13:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 18:13:14,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6452991452991453 [2024-06-21 18:13:14,812 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1196 flow. Second operand 6 states and 151 transitions. [2024-06-21 18:13:14,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1672 flow [2024-06-21 18:13:14,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1622 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:14,839 INFO L231 Difference]: Finished difference. Result has 107 places, 122 transitions, 1260 flow [2024-06-21 18:13:14,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1260, PETRI_PLACES=107, PETRI_TRANSITIONS=122} [2024-06-21 18:13:14,840 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 67 predicate places. [2024-06-21 18:13:14,840 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 122 transitions, 1260 flow [2024-06-21 18:13:14,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:14,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:14,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:14,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:13:14,841 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:14,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash 697487589, now seen corresponding path program 3 times [2024-06-21 18:13:14,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:14,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732980104] [2024-06-21 18:13:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:14,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:14,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:14,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732980104] [2024-06-21 18:13:14,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732980104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:14,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:14,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:14,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940300388] [2024-06-21 18:13:14,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:14,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:14,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:14,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:14,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:14,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 122 transitions, 1260 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:14,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:14,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:14,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:15,225 INFO L124 PetriNetUnfolderBase]: 1099/1830 cut-off events. [2024-06-21 18:13:15,225 INFO L125 PetriNetUnfolderBase]: For 27838/27852 co-relation queries the response was YES. [2024-06-21 18:13:15,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10198 conditions, 1830 events. 1099/1830 cut-off events. For 27838/27852 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9643 event pairs, 225 based on Foata normal form. 26/1849 useless extension candidates. Maximal degree in co-relation 10143. Up to 1285 conditions per place. [2024-06-21 18:13:15,239 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 110 selfloop transitions, 39 changer transitions 0/156 dead transitions. [2024-06-21 18:13:15,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 156 transitions, 1834 flow [2024-06-21 18:13:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 18:13:15,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-21 18:13:15,240 INFO L175 Difference]: Start difference. First operand has 107 places, 122 transitions, 1260 flow. Second operand 6 states and 155 transitions. [2024-06-21 18:13:15,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 156 transitions, 1834 flow [2024-06-21 18:13:15,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 156 transitions, 1742 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:15,316 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 1307 flow [2024-06-21 18:13:15,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1307, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2024-06-21 18:13:15,317 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 69 predicate places. [2024-06-21 18:13:15,317 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 1307 flow [2024-06-21 18:13:15,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:15,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:15,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:13:15,318 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:15,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:15,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1806019241, now seen corresponding path program 2 times [2024-06-21 18:13:15,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:15,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528733062] [2024-06-21 18:13:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:15,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:15,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:15,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528733062] [2024-06-21 18:13:15,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528733062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:15,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:15,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:15,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146911107] [2024-06-21 18:13:15,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:15,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:15,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:15,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:15,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 1307 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:15,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:15,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:15,629 INFO L124 PetriNetUnfolderBase]: 1047/1750 cut-off events. [2024-06-21 18:13:15,629 INFO L125 PetriNetUnfolderBase]: For 28509/28516 co-relation queries the response was YES. [2024-06-21 18:13:15,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10047 conditions, 1750 events. 1047/1750 cut-off events. For 28509/28516 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9306 event pairs, 262 based on Foata normal form. 8/1738 useless extension candidates. Maximal degree in co-relation 9990. Up to 1481 conditions per place. [2024-06-21 18:13:15,643 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 90 selfloop transitions, 37 changer transitions 0/139 dead transitions. [2024-06-21 18:13:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 139 transitions, 1704 flow [2024-06-21 18:13:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 18:13:15,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102564102564103 [2024-06-21 18:13:15,645 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 1307 flow. Second operand 5 states and 119 transitions. [2024-06-21 18:13:15,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 139 transitions, 1704 flow [2024-06-21 18:13:15,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 139 transitions, 1629 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:15,685 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 1352 flow [2024-06-21 18:13:15,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1352, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2024-06-21 18:13:15,685 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-06-21 18:13:15,685 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 1352 flow [2024-06-21 18:13:15,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:15,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:15,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:13:15,686 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:15,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:15,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1844378083, now seen corresponding path program 1 times [2024-06-21 18:13:15,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:15,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361337917] [2024-06-21 18:13:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:15,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:15,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:15,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361337917] [2024-06-21 18:13:15,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361337917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:15,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:15,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:15,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925401385] [2024-06-21 18:13:15,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:15,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:15,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:15,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:15,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:15,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:15,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 1352 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:15,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:15,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:15,998 INFO L124 PetriNetUnfolderBase]: 1061/1782 cut-off events. [2024-06-21 18:13:15,998 INFO L125 PetriNetUnfolderBase]: For 30893/30898 co-relation queries the response was YES. [2024-06-21 18:13:16,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10135 conditions, 1782 events. 1061/1782 cut-off events. For 30893/30898 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9508 event pairs, 247 based on Foata normal form. 15/1780 useless extension candidates. Maximal degree in co-relation 10075. Up to 1534 conditions per place. [2024-06-21 18:13:16,011 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 116 selfloop transitions, 14 changer transitions 0/143 dead transitions. [2024-06-21 18:13:16,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 143 transitions, 1680 flow [2024-06-21 18:13:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 18:13:16,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205128205128205 [2024-06-21 18:13:16,013 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 1352 flow. Second operand 5 states and 121 transitions. [2024-06-21 18:13:16,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 143 transitions, 1680 flow [2024-06-21 18:13:16,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 1617 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:16,047 INFO L231 Difference]: Finished difference. Result has 114 places, 130 transitions, 1349 flow [2024-06-21 18:13:16,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1349, PETRI_PLACES=114, PETRI_TRANSITIONS=130} [2024-06-21 18:13:16,048 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 74 predicate places. [2024-06-21 18:13:16,048 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 130 transitions, 1349 flow [2024-06-21 18:13:16,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:13:16,049 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash -452333815, now seen corresponding path program 1 times [2024-06-21 18:13:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619907428] [2024-06-21 18:13:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:16,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619907428] [2024-06-21 18:13:16,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619907428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:16,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:16,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:16,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869221812] [2024-06-21 18:13:16,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:16,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:16,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:16,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 130 transitions, 1349 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:16,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:16,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:16,620 INFO L124 PetriNetUnfolderBase]: 1679/2869 cut-off events. [2024-06-21 18:13:16,620 INFO L125 PetriNetUnfolderBase]: For 61991/62005 co-relation queries the response was YES. [2024-06-21 18:13:16,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16342 conditions, 2869 events. 1679/2869 cut-off events. For 61991/62005 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17313 event pairs, 436 based on Foata normal form. 50/2918 useless extension candidates. Maximal degree in co-relation 16282. Up to 1290 conditions per place. [2024-06-21 18:13:16,640 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 136 selfloop transitions, 49 changer transitions 0/192 dead transitions. [2024-06-21 18:13:16,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 192 transitions, 2209 flow [2024-06-21 18:13:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-21 18:13:16,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 18:13:16,641 INFO L175 Difference]: Start difference. First operand has 114 places, 130 transitions, 1349 flow. Second operand 9 states and 234 transitions. [2024-06-21 18:13:16,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 192 transitions, 2209 flow [2024-06-21 18:13:16,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 192 transitions, 2169 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:16,711 INFO L231 Difference]: Finished difference. Result has 122 places, 133 transitions, 1505 flow [2024-06-21 18:13:16,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1505, PETRI_PLACES=122, PETRI_TRANSITIONS=133} [2024-06-21 18:13:16,712 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 82 predicate places. [2024-06-21 18:13:16,712 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 133 transitions, 1505 flow [2024-06-21 18:13:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:13:16,713 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1140447321, now seen corresponding path program 2 times [2024-06-21 18:13:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813180320] [2024-06-21 18:13:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:16,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813180320] [2024-06-21 18:13:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813180320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:16,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:16,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:16,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517908300] [2024-06-21 18:13:16,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:16,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:16,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:16,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:16,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 133 transitions, 1505 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:16,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:16,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,362 INFO L124 PetriNetUnfolderBase]: 1838/3146 cut-off events. [2024-06-21 18:13:17,363 INFO L125 PetriNetUnfolderBase]: For 74723/74737 co-relation queries the response was YES. [2024-06-21 18:13:17,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18122 conditions, 3146 events. 1838/3146 cut-off events. For 74723/74737 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19519 event pairs, 638 based on Foata normal form. 56/3193 useless extension candidates. Maximal degree in co-relation 18060. Up to 2437 conditions per place. [2024-06-21 18:13:17,386 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 122 selfloop transitions, 49 changer transitions 0/178 dead transitions. [2024-06-21 18:13:17,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 178 transitions, 2113 flow [2024-06-21 18:13:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 18:13:17,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.617948717948718 [2024-06-21 18:13:17,388 INFO L175 Difference]: Start difference. First operand has 122 places, 133 transitions, 1505 flow. Second operand 10 states and 241 transitions. [2024-06-21 18:13:17,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 178 transitions, 2113 flow [2024-06-21 18:13:17,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 178 transitions, 2005 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:17,473 INFO L231 Difference]: Finished difference. Result has 127 places, 134 transitions, 1539 flow [2024-06-21 18:13:17,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1539, PETRI_PLACES=127, PETRI_TRANSITIONS=134} [2024-06-21 18:13:17,473 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 87 predicate places. [2024-06-21 18:13:17,474 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 134 transitions, 1539 flow [2024-06-21 18:13:17,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:13:17,474 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1140595191, now seen corresponding path program 3 times [2024-06-21 18:13:17,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835505171] [2024-06-21 18:13:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835505171] [2024-06-21 18:13:17,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835505171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:17,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247769885] [2024-06-21 18:13:17,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:17,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:17,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:17,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:17,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 134 transitions, 1539 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:17,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,209 INFO L124 PetriNetUnfolderBase]: 2142/3708 cut-off events. [2024-06-21 18:13:18,210 INFO L125 PetriNetUnfolderBase]: For 88638/88652 co-relation queries the response was YES. [2024-06-21 18:13:18,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21141 conditions, 3708 events. 2142/3708 cut-off events. For 88638/88652 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24192 event pairs, 760 based on Foata normal form. 50/3757 useless extension candidates. Maximal degree in co-relation 21078. Up to 2374 conditions per place. [2024-06-21 18:13:18,265 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 134 selfloop transitions, 49 changer transitions 0/190 dead transitions. [2024-06-21 18:13:18,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 190 transitions, 2291 flow [2024-06-21 18:13:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-21 18:13:18,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:18,267 INFO L175 Difference]: Start difference. First operand has 127 places, 134 transitions, 1539 flow. Second operand 10 states and 250 transitions. [2024-06-21 18:13:18,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 190 transitions, 2291 flow [2024-06-21 18:13:18,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 190 transitions, 2169 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:18,370 INFO L231 Difference]: Finished difference. Result has 130 places, 136 transitions, 1592 flow [2024-06-21 18:13:18,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1592, PETRI_PLACES=130, PETRI_TRANSITIONS=136} [2024-06-21 18:13:18,371 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 90 predicate places. [2024-06-21 18:13:18,371 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 136 transitions, 1592 flow [2024-06-21 18:13:18,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:18,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:18,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:13:18,372 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:18,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1233958013, now seen corresponding path program 1 times [2024-06-21 18:13:18,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:18,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589896190] [2024-06-21 18:13:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:18,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589896190] [2024-06-21 18:13:18,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589896190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:18,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837418077] [2024-06-21 18:13:18,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:18,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:18,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 136 transitions, 1592 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:18,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,975 INFO L124 PetriNetUnfolderBase]: 2147/3723 cut-off events. [2024-06-21 18:13:18,976 INFO L125 PetriNetUnfolderBase]: For 83084/83092 co-relation queries the response was YES. [2024-06-21 18:13:18,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21400 conditions, 3723 events. 2147/3723 cut-off events. For 83084/83092 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24241 event pairs, 853 based on Foata normal form. 9/3731 useless extension candidates. Maximal degree in co-relation 21334. Up to 3375 conditions per place. [2024-06-21 18:13:19,003 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 140 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-21 18:13:19,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 165 transitions, 2170 flow [2024-06-21 18:13:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 18:13:19,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-21 18:13:19,006 INFO L175 Difference]: Start difference. First operand has 130 places, 136 transitions, 1592 flow. Second operand 7 states and 150 transitions. [2024-06-21 18:13:19,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 165 transitions, 2170 flow [2024-06-21 18:13:19,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 165 transitions, 2027 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:19,111 INFO L231 Difference]: Finished difference. Result has 131 places, 146 transitions, 1673 flow [2024-06-21 18:13:19,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=131, PETRI_TRANSITIONS=146} [2024-06-21 18:13:19,112 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 91 predicate places. [2024-06-21 18:13:19,112 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 146 transitions, 1673 flow [2024-06-21 18:13:19,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:13:19,113 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1861388347, now seen corresponding path program 4 times [2024-06-21 18:13:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820399728] [2024-06-21 18:13:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:19,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820399728] [2024-06-21 18:13:19,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820399728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:19,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:19,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107778088] [2024-06-21 18:13:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:19,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:19,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:19,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:19,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:19,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 146 transitions, 1673 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:19,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:19,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,794 INFO L124 PetriNetUnfolderBase]: 2306/3992 cut-off events. [2024-06-21 18:13:19,795 INFO L125 PetriNetUnfolderBase]: For 104667/104681 co-relation queries the response was YES. [2024-06-21 18:13:19,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22476 conditions, 3992 events. 2306/3992 cut-off events. For 104667/104681 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26380 event pairs, 911 based on Foata normal form. 56/4043 useless extension candidates. Maximal degree in co-relation 22409. Up to 3261 conditions per place. [2024-06-21 18:13:19,823 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 126 selfloop transitions, 47 changer transitions 0/180 dead transitions. [2024-06-21 18:13:19,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 2213 flow [2024-06-21 18:13:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 18:13:19,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652014652014652 [2024-06-21 18:13:19,824 INFO L175 Difference]: Start difference. First operand has 131 places, 146 transitions, 1673 flow. Second operand 7 states and 178 transitions. [2024-06-21 18:13:19,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 2213 flow [2024-06-21 18:13:19,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 2186 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:19,930 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 1788 flow [2024-06-21 18:13:19,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=136, PETRI_TRANSITIONS=147} [2024-06-21 18:13:19,931 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-21 18:13:19,931 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 1788 flow [2024-06-21 18:13:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:13:19,932 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash 654433481, now seen corresponding path program 5 times [2024-06-21 18:13:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101101174] [2024-06-21 18:13:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101101174] [2024-06-21 18:13:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101101174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:20,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661609269] [2024-06-21 18:13:20,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:20,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:20,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:20,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 147 transitions, 1788 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:20,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:20,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:20,692 INFO L124 PetriNetUnfolderBase]: 2437/4269 cut-off events. [2024-06-21 18:13:20,692 INFO L125 PetriNetUnfolderBase]: For 110820/110834 co-relation queries the response was YES. [2024-06-21 18:13:20,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23952 conditions, 4269 events. 2437/4269 cut-off events. For 110820/110834 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28926 event pairs, 839 based on Foata normal form. 50/4318 useless extension candidates. Maximal degree in co-relation 23883. Up to 2675 conditions per place. [2024-06-21 18:13:20,723 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 136 selfloop transitions, 48 changer transitions 0/191 dead transitions. [2024-06-21 18:13:20,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 191 transitions, 2554 flow [2024-06-21 18:13:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 18:13:20,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6776556776556777 [2024-06-21 18:13:20,724 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 1788 flow. Second operand 7 states and 185 transitions. [2024-06-21 18:13:20,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 191 transitions, 2554 flow [2024-06-21 18:13:20,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 2432 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:20,860 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 1855 flow [2024-06-21 18:13:20,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1666, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1855, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2024-06-21 18:13:20,861 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 99 predicate places. [2024-06-21 18:13:20,861 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 1855 flow [2024-06-21 18:13:20,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:20,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:20,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:13:20,862 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:20,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:20,862 INFO L85 PathProgramCache]: Analyzing trace with hash 659943731, now seen corresponding path program 6 times [2024-06-21 18:13:20,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:20,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395852946] [2024-06-21 18:13:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:20,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395852946] [2024-06-21 18:13:20,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395852946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:20,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507972109] [2024-06-21 18:13:20,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:20,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:20,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:21,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:21,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 1855 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:21,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:21,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:21,620 INFO L124 PetriNetUnfolderBase]: 2485/4333 cut-off events. [2024-06-21 18:13:21,620 INFO L125 PetriNetUnfolderBase]: For 115990/116004 co-relation queries the response was YES. [2024-06-21 18:13:21,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23889 conditions, 4333 events. 2485/4333 cut-off events. For 115990/116004 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 29386 event pairs, 1013 based on Foata normal form. 56/4384 useless extension candidates. Maximal degree in co-relation 23818. Up to 3632 conditions per place. [2024-06-21 18:13:21,654 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 127 selfloop transitions, 51 changer transitions 3/188 dead transitions. [2024-06-21 18:13:21,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 2431 flow [2024-06-21 18:13:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 18:13:21,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-21 18:13:21,656 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 1855 flow. Second operand 9 states and 219 transitions. [2024-06-21 18:13:21,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 2431 flow [2024-06-21 18:13:21,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 188 transitions, 2286 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:21,836 INFO L231 Difference]: Finished difference. Result has 143 places, 149 transitions, 1850 flow [2024-06-21 18:13:21,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1850, PETRI_PLACES=143, PETRI_TRANSITIONS=149} [2024-06-21 18:13:21,846 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-21 18:13:21,846 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 149 transitions, 1850 flow [2024-06-21 18:13:21,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:21,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:21,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:13:21,848 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:21,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash 660158933, now seen corresponding path program 1 times [2024-06-21 18:13:21,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:21,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693529336] [2024-06-21 18:13:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:22,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693529336] [2024-06-21 18:13:22,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693529336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:22,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:22,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:22,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311438717] [2024-06-21 18:13:22,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:22,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:22,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:22,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:22,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 149 transitions, 1850 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:22,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:22,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:22,726 INFO L124 PetriNetUnfolderBase]: 2584/4517 cut-off events. [2024-06-21 18:13:22,727 INFO L125 PetriNetUnfolderBase]: For 121719/121733 co-relation queries the response was YES. [2024-06-21 18:13:22,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24497 conditions, 4517 events. 2584/4517 cut-off events. For 121719/121733 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30980 event pairs, 910 based on Foata normal form. 50/4562 useless extension candidates. Maximal degree in co-relation 24425. Up to 3238 conditions per place. [2024-06-21 18:13:22,763 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 127 selfloop transitions, 55 changer transitions 5/194 dead transitions. [2024-06-21 18:13:22,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 194 transitions, 2478 flow [2024-06-21 18:13:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 18:13:22,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381766381766382 [2024-06-21 18:13:22,765 INFO L175 Difference]: Start difference. First operand has 143 places, 149 transitions, 1850 flow. Second operand 9 states and 224 transitions. [2024-06-21 18:13:22,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 194 transitions, 2478 flow [2024-06-21 18:13:22,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 194 transitions, 2343 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:22,938 INFO L231 Difference]: Finished difference. Result has 145 places, 148 transitions, 1850 flow [2024-06-21 18:13:22,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1850, PETRI_PLACES=145, PETRI_TRANSITIONS=148} [2024-06-21 18:13:22,939 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 105 predicate places. [2024-06-21 18:13:22,939 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 148 transitions, 1850 flow [2024-06-21 18:13:22,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:22,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:22,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:13:22,939 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:22,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1234256543, now seen corresponding path program 2 times [2024-06-21 18:13:22,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:22,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203341789] [2024-06-21 18:13:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:22,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203341789] [2024-06-21 18:13:23,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203341789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:23,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738781974] [2024-06-21 18:13:23,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:23,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:23,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 148 transitions, 1850 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:23,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:23,584 INFO L124 PetriNetUnfolderBase]: 2407/4219 cut-off events. [2024-06-21 18:13:23,584 INFO L125 PetriNetUnfolderBase]: For 107896/107898 co-relation queries the response was YES. [2024-06-21 18:13:23,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23389 conditions, 4219 events. 2407/4219 cut-off events. For 107896/107898 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28605 event pairs, 992 based on Foata normal form. 1/4218 useless extension candidates. Maximal degree in co-relation 23315. Up to 3849 conditions per place. [2024-06-21 18:13:23,616 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 133 selfloop transitions, 19 changer transitions 0/158 dead transitions. [2024-06-21 18:13:23,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 2183 flow [2024-06-21 18:13:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 18:13:23,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-06-21 18:13:23,617 INFO L175 Difference]: Start difference. First operand has 145 places, 148 transitions, 1850 flow. Second operand 6 states and 124 transitions. [2024-06-21 18:13:23,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 2183 flow [2024-06-21 18:13:23,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 158 transitions, 2033 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:23,746 INFO L231 Difference]: Finished difference. Result has 144 places, 148 transitions, 1744 flow [2024-06-21 18:13:23,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1744, PETRI_PLACES=144, PETRI_TRANSITIONS=148} [2024-06-21 18:13:23,746 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 104 predicate places. [2024-06-21 18:13:23,747 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 148 transitions, 1744 flow [2024-06-21 18:13:23,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:23,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:23,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:13:23,747 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:23,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash 101075059, now seen corresponding path program 7 times [2024-06-21 18:13:23,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:23,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767726214] [2024-06-21 18:13:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:23,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767726214] [2024-06-21 18:13:23,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767726214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146382053] [2024-06-21 18:13:23,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:23,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:23,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:23,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:23,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 148 transitions, 1744 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:23,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:24,488 INFO L124 PetriNetUnfolderBase]: 2516/4401 cut-off events. [2024-06-21 18:13:24,488 INFO L125 PetriNetUnfolderBase]: For 133265/133279 co-relation queries the response was YES. [2024-06-21 18:13:24,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23859 conditions, 4401 events. 2516/4401 cut-off events. For 133265/133279 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29973 event pairs, 1035 based on Foata normal form. 56/4448 useless extension candidates. Maximal degree in co-relation 23784. Up to 3637 conditions per place. [2024-06-21 18:13:24,521 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 116 selfloop transitions, 68 changer transitions 3/194 dead transitions. [2024-06-21 18:13:24,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 194 transitions, 2556 flow [2024-06-21 18:13:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-21 18:13:24,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:24,523 INFO L175 Difference]: Start difference. First operand has 144 places, 148 transitions, 1744 flow. Second operand 9 states and 225 transitions. [2024-06-21 18:13:24,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 194 transitions, 2556 flow [2024-06-21 18:13:24,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 194 transitions, 2525 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:24,709 INFO L231 Difference]: Finished difference. Result has 149 places, 148 transitions, 1899 flow [2024-06-21 18:13:24,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1899, PETRI_PLACES=149, PETRI_TRANSITIONS=148} [2024-06-21 18:13:24,710 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 18:13:24,710 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 148 transitions, 1899 flow [2024-06-21 18:13:24,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:24,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:24,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:13:24,710 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:24,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:24,711 INFO L85 PathProgramCache]: Analyzing trace with hash 138082901, now seen corresponding path program 2 times [2024-06-21 18:13:24,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:24,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500629676] [2024-06-21 18:13:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:24,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:24,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:24,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500629676] [2024-06-21 18:13:24,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500629676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:24,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:24,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:24,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464794756] [2024-06-21 18:13:24,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:24,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:24,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:24,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:24,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 148 transitions, 1899 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:24,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:24,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:25,515 INFO L124 PetriNetUnfolderBase]: 2615/4600 cut-off events. [2024-06-21 18:13:25,516 INFO L125 PetriNetUnfolderBase]: For 142204/142218 co-relation queries the response was YES. [2024-06-21 18:13:25,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25144 conditions, 4600 events. 2615/4600 cut-off events. For 142204/142218 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31817 event pairs, 1035 based on Foata normal form. 50/4641 useless extension candidates. Maximal degree in co-relation 25068. Up to 3573 conditions per place. [2024-06-21 18:13:25,550 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 121 selfloop transitions, 70 changer transitions 6/204 dead transitions. [2024-06-21 18:13:25,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 204 transitions, 2787 flow [2024-06-21 18:13:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-21 18:13:25,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:25,551 INFO L175 Difference]: Start difference. First operand has 149 places, 148 transitions, 1899 flow. Second operand 10 states and 250 transitions. [2024-06-21 18:13:25,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 204 transitions, 2787 flow [2024-06-21 18:13:25,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 204 transitions, 2614 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:25,766 INFO L231 Difference]: Finished difference. Result has 152 places, 148 transitions, 1912 flow [2024-06-21 18:13:25,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1912, PETRI_PLACES=152, PETRI_TRANSITIONS=148} [2024-06-21 18:13:25,767 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 18:13:25,767 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 148 transitions, 1912 flow [2024-06-21 18:13:25,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:25,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:25,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:25,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:13:25,768 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:25,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash 147279671, now seen corresponding path program 3 times [2024-06-21 18:13:25,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:25,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710546131] [2024-06-21 18:13:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:25,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:25,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710546131] [2024-06-21 18:13:25,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710546131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:25,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:25,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022758795] [2024-06-21 18:13:25,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:25,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:25,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:25,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 148 transitions, 1912 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:25,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:25,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:25,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:26,519 INFO L124 PetriNetUnfolderBase]: 2760/4831 cut-off events. [2024-06-21 18:13:26,520 INFO L125 PetriNetUnfolderBase]: For 156701/156715 co-relation queries the response was YES. [2024-06-21 18:13:26,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26259 conditions, 4831 events. 2760/4831 cut-off events. For 156701/156715 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33647 event pairs, 1002 based on Foata normal form. 50/4868 useless extension candidates. Maximal degree in co-relation 26182. Up to 2795 conditions per place. [2024-06-21 18:13:26,559 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 113 selfloop transitions, 75 changer transitions 8/203 dead transitions. [2024-06-21 18:13:26,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 203 transitions, 2784 flow [2024-06-21 18:13:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 18:13:26,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6609686609686609 [2024-06-21 18:13:26,560 INFO L175 Difference]: Start difference. First operand has 152 places, 148 transitions, 1912 flow. Second operand 9 states and 232 transitions. [2024-06-21 18:13:26,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 203 transitions, 2784 flow [2024-06-21 18:13:26,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 203 transitions, 2604 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:26,867 INFO L231 Difference]: Finished difference. Result has 152 places, 145 transitions, 1792 flow [2024-06-21 18:13:26,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1792, PETRI_PLACES=152, PETRI_TRANSITIONS=145} [2024-06-21 18:13:26,868 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 18:13:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 145 transitions, 1792 flow [2024-06-21 18:13:26,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:26,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:26,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:26,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:13:26,869 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:26,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash -177938721, now seen corresponding path program 3 times [2024-06-21 18:13:26,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661694862] [2024-06-21 18:13:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:26,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:26,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:26,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661694862] [2024-06-21 18:13:26,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661694862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:26,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:26,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:26,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546713220] [2024-06-21 18:13:26,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:26,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:26,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 145 transitions, 1792 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:26,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:26,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:26,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:27,459 INFO L124 PetriNetUnfolderBase]: 2484/4367 cut-off events. [2024-06-21 18:13:27,459 INFO L125 PetriNetUnfolderBase]: For 140462/140464 co-relation queries the response was YES. [2024-06-21 18:13:27,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24563 conditions, 4367 events. 2484/4367 cut-off events. For 140462/140464 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29835 event pairs, 1053 based on Foata normal form. 1/4366 useless extension candidates. Maximal degree in co-relation 24484. Up to 3987 conditions per place. [2024-06-21 18:13:27,495 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 131 selfloop transitions, 24 changer transitions 0/161 dead transitions. [2024-06-21 18:13:27,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 161 transitions, 2198 flow [2024-06-21 18:13:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 18:13:27,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2024-06-21 18:13:27,497 INFO L175 Difference]: Start difference. First operand has 152 places, 145 transitions, 1792 flow. Second operand 6 states and 127 transitions. [2024-06-21 18:13:27,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 161 transitions, 2198 flow [2024-06-21 18:13:27,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 161 transitions, 1990 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:27,685 INFO L231 Difference]: Finished difference. Result has 152 places, 150 transitions, 1719 flow [2024-06-21 18:13:27,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1719, PETRI_PLACES=152, PETRI_TRANSITIONS=150} [2024-06-21 18:13:27,686 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 18:13:27,686 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 150 transitions, 1719 flow [2024-06-21 18:13:27,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:27,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:27,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:13:27,687 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:27,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:27,687 INFO L85 PathProgramCache]: Analyzing trace with hash 743191006, now seen corresponding path program 1 times [2024-06-21 18:13:27,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047971997] [2024-06-21 18:13:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:27,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047971997] [2024-06-21 18:13:27,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047971997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:27,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:27,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:27,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213812557] [2024-06-21 18:13:27,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:27,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:27,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:27,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 150 transitions, 1719 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:27,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:27,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:28,294 INFO L124 PetriNetUnfolderBase]: 2333/4143 cut-off events. [2024-06-21 18:13:28,294 INFO L125 PetriNetUnfolderBase]: For 133753/133760 co-relation queries the response was YES. [2024-06-21 18:13:28,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22488 conditions, 4143 events. 2333/4143 cut-off events. For 133753/133760 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28390 event pairs, 926 based on Foata normal form. 17/4139 useless extension candidates. Maximal degree in co-relation 22406. Up to 3620 conditions per place. [2024-06-21 18:13:28,321 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 123 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2024-06-21 18:13:28,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 169 transitions, 2115 flow [2024-06-21 18:13:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 18:13:28,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 18:13:28,322 INFO L175 Difference]: Start difference. First operand has 152 places, 150 transitions, 1719 flow. Second operand 6 states and 143 transitions. [2024-06-21 18:13:28,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 169 transitions, 2115 flow [2024-06-21 18:13:28,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 169 transitions, 2053 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:28,449 INFO L231 Difference]: Finished difference. Result has 155 places, 152 transitions, 1767 flow [2024-06-21 18:13:28,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1767, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2024-06-21 18:13:28,450 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 115 predicate places. [2024-06-21 18:13:28,450 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 1767 flow [2024-06-21 18:13:28,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:28,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:28,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:13:28,450 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:28,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1360855356, now seen corresponding path program 2 times [2024-06-21 18:13:28,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:28,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123981077] [2024-06-21 18:13:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:28,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:28,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123981077] [2024-06-21 18:13:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123981077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:28,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:28,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:28,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086638978] [2024-06-21 18:13:28,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:28,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:28,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:28,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:28,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 1767 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:28,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:28,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:28,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,022 INFO L124 PetriNetUnfolderBase]: 2373/4200 cut-off events. [2024-06-21 18:13:29,022 INFO L125 PetriNetUnfolderBase]: For 141940/141947 co-relation queries the response was YES. [2024-06-21 18:13:29,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23206 conditions, 4200 events. 2373/4200 cut-off events. For 141940/141947 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28848 event pairs, 977 based on Foata normal form. 17/4194 useless extension candidates. Maximal degree in co-relation 23123. Up to 3702 conditions per place. [2024-06-21 18:13:29,054 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 39 changer transitions 0/170 dead transitions. [2024-06-21 18:13:29,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 170 transitions, 2309 flow [2024-06-21 18:13:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 18:13:29,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 18:13:29,055 INFO L175 Difference]: Start difference. First operand has 155 places, 152 transitions, 1767 flow. Second operand 6 states and 143 transitions. [2024-06-21 18:13:29,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 170 transitions, 2309 flow [2024-06-21 18:13:29,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 170 transitions, 2235 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:29,228 INFO L231 Difference]: Finished difference. Result has 157 places, 154 transitions, 1822 flow [2024-06-21 18:13:29,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1822, PETRI_PLACES=157, PETRI_TRANSITIONS=154} [2024-06-21 18:13:29,228 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-06-21 18:13:29,228 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 154 transitions, 1822 flow [2024-06-21 18:13:29,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:29,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:29,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:13:29,229 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:29,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1374187836, now seen corresponding path program 3 times [2024-06-21 18:13:29,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:29,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498747462] [2024-06-21 18:13:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:29,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:29,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498747462] [2024-06-21 18:13:29,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498747462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:29,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:29,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:29,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448465938] [2024-06-21 18:13:29,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:29,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:29,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:29,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:29,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:29,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-21 18:13:29,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 154 transitions, 1822 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:29,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:29,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-21 18:13:29,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:29,875 INFO L124 PetriNetUnfolderBase]: 2438/4301 cut-off events. [2024-06-21 18:13:29,876 INFO L125 PetriNetUnfolderBase]: For 152669/152676 co-relation queries the response was YES. [2024-06-21 18:13:29,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24022 conditions, 4301 events. 2438/4301 cut-off events. For 152669/152676 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29612 event pairs, 945 based on Foata normal form. 17/4295 useless extension candidates. Maximal degree in co-relation 23938. Up to 3605 conditions per place. [2024-06-21 18:13:29,913 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 44 changer transitions 0/178 dead transitions. [2024-06-21 18:13:29,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 178 transitions, 2504 flow [2024-06-21 18:13:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 18:13:29,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 18:13:29,915 INFO L175 Difference]: Start difference. First operand has 157 places, 154 transitions, 1822 flow. Second operand 6 states and 148 transitions. [2024-06-21 18:13:29,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 178 transitions, 2504 flow [2024-06-21 18:13:30,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 178 transitions, 2371 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:30,126 INFO L231 Difference]: Finished difference. Result has 159 places, 157 transitions, 1846 flow [2024-06-21 18:13:30,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1846, PETRI_PLACES=159, PETRI_TRANSITIONS=157} [2024-06-21 18:13:30,127 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 119 predicate places. [2024-06-21 18:13:30,127 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 157 transitions, 1846 flow [2024-06-21 18:13:30,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:30,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:30,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:13:30,127 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:30,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:30,128 INFO L85 PathProgramCache]: Analyzing trace with hash 417001180, now seen corresponding path program 1 times [2024-06-21 18:13:30,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:30,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538418525] [2024-06-21 18:13:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:30,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:30,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:30,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538418525] [2024-06-21 18:13:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538418525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:30,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:30,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657669587] [2024-06-21 18:13:30,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:30,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:30,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:30,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:30,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:30,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 157 transitions, 1846 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:30,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:30,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:30,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,037 INFO L124 PetriNetUnfolderBase]: 2511/4408 cut-off events. [2024-06-21 18:13:31,037 INFO L125 PetriNetUnfolderBase]: For 153338/153350 co-relation queries the response was YES. [2024-06-21 18:13:31,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24725 conditions, 4408 events. 2511/4408 cut-off events. For 153338/153350 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30166 event pairs, 1011 based on Foata normal form. 14/4421 useless extension candidates. Maximal degree in co-relation 24641. Up to 3889 conditions per place. [2024-06-21 18:13:31,076 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 130 selfloop transitions, 55 changer transitions 1/193 dead transitions. [2024-06-21 18:13:31,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 193 transitions, 2478 flow [2024-06-21 18:13:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 18:13:31,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096866096866097 [2024-06-21 18:13:31,079 INFO L175 Difference]: Start difference. First operand has 159 places, 157 transitions, 1846 flow. Second operand 9 states and 214 transitions. [2024-06-21 18:13:31,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 193 transitions, 2478 flow [2024-06-21 18:13:31,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 193 transitions, 2397 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:31,259 INFO L231 Difference]: Finished difference. Result has 166 places, 159 transitions, 1902 flow [2024-06-21 18:13:31,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1902, PETRI_PLACES=166, PETRI_TRANSITIONS=159} [2024-06-21 18:13:31,260 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-21 18:13:31,260 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 159 transitions, 1902 flow [2024-06-21 18:13:31,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:31,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:13:31,261 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:31,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash 422715100, now seen corresponding path program 2 times [2024-06-21 18:13:31,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:31,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690186015] [2024-06-21 18:13:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:31,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:31,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:31,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690186015] [2024-06-21 18:13:31,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690186015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:31,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:31,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:31,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100591582] [2024-06-21 18:13:31,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:31,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:31,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:31,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:31,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:31,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 159 transitions, 1902 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:31,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:31,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:31,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:31,948 INFO L124 PetriNetUnfolderBase]: 2530/4439 cut-off events. [2024-06-21 18:13:31,948 INFO L125 PetriNetUnfolderBase]: For 160949/160961 co-relation queries the response was YES. [2024-06-21 18:13:31,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25208 conditions, 4439 events. 2530/4439 cut-off events. For 160949/160961 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30359 event pairs, 1011 based on Foata normal form. 13/4451 useless extension candidates. Maximal degree in co-relation 25122. Up to 3908 conditions per place. [2024-06-21 18:13:31,985 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 61 changer transitions 1/192 dead transitions. [2024-06-21 18:13:31,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 192 transitions, 2590 flow [2024-06-21 18:13:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 18:13:31,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-21 18:13:31,989 INFO L175 Difference]: Start difference. First operand has 166 places, 159 transitions, 1902 flow. Second operand 8 states and 189 transitions. [2024-06-21 18:13:31,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 192 transitions, 2590 flow [2024-06-21 18:13:32,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 192 transitions, 2484 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:32,176 INFO L231 Difference]: Finished difference. Result has 169 places, 165 transitions, 2031 flow [2024-06-21 18:13:32,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2031, PETRI_PLACES=169, PETRI_TRANSITIONS=165} [2024-06-21 18:13:32,177 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-21 18:13:32,177 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 165 transitions, 2031 flow [2024-06-21 18:13:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:32,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:32,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:13:32,178 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:32,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash 414141244, now seen corresponding path program 1 times [2024-06-21 18:13:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:32,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833293513] [2024-06-21 18:13:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:32,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:32,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:32,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833293513] [2024-06-21 18:13:32,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833293513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:32,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:32,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:32,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098236226] [2024-06-21 18:13:32,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:32,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:32,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:32,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:32,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:32,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:32,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 165 transitions, 2031 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:32,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:32,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:32,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:32,873 INFO L124 PetriNetUnfolderBase]: 2548/4467 cut-off events. [2024-06-21 18:13:32,873 INFO L125 PetriNetUnfolderBase]: For 172673/172681 co-relation queries the response was YES. [2024-06-21 18:13:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 4467 events. 2548/4467 cut-off events. For 172673/172681 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30501 event pairs, 910 based on Foata normal form. 14/4480 useless extension candidates. Maximal degree in co-relation 25477. Up to 3976 conditions per place. [2024-06-21 18:13:32,911 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 166 selfloop transitions, 23 changer transitions 0/196 dead transitions. [2024-06-21 18:13:32,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 196 transitions, 2597 flow [2024-06-21 18:13:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 18:13:32,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 18:13:32,912 INFO L175 Difference]: Start difference. First operand has 169 places, 165 transitions, 2031 flow. Second operand 8 states and 180 transitions. [2024-06-21 18:13:32,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 196 transitions, 2597 flow [2024-06-21 18:13:33,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 196 transitions, 2512 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:33,134 INFO L231 Difference]: Finished difference. Result has 173 places, 166 transitions, 2005 flow [2024-06-21 18:13:33,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2005, PETRI_PLACES=173, PETRI_TRANSITIONS=166} [2024-06-21 18:13:33,134 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 18:13:33,134 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 166 transitions, 2005 flow [2024-06-21 18:13:33,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:33,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:33,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:13:33,138 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:33,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:33,138 INFO L85 PathProgramCache]: Analyzing trace with hash 422712124, now seen corresponding path program 2 times [2024-06-21 18:13:33,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:33,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681962472] [2024-06-21 18:13:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:33,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:33,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681962472] [2024-06-21 18:13:33,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681962472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:33,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:33,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761896033] [2024-06-21 18:13:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:33,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:33,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:33,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:33,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 166 transitions, 2005 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:33,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:33,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:33,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:33,815 INFO L124 PetriNetUnfolderBase]: 2576/4511 cut-off events. [2024-06-21 18:13:33,816 INFO L125 PetriNetUnfolderBase]: For 182245/182253 co-relation queries the response was YES. [2024-06-21 18:13:33,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25874 conditions, 4511 events. 2576/4511 cut-off events. For 182245/182253 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30861 event pairs, 1004 based on Foata normal form. 16/4526 useless extension candidates. Maximal degree in co-relation 25785. Up to 4096 conditions per place. [2024-06-21 18:13:33,853 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 163 selfloop transitions, 20 changer transitions 0/190 dead transitions. [2024-06-21 18:13:33,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 190 transitions, 2457 flow [2024-06-21 18:13:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 18:13:33,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-21 18:13:33,855 INFO L175 Difference]: Start difference. First operand has 173 places, 166 transitions, 2005 flow. Second operand 8 states and 174 transitions. [2024-06-21 18:13:33,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 190 transitions, 2457 flow [2024-06-21 18:13:34,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 190 transitions, 2418 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:34,132 INFO L231 Difference]: Finished difference. Result has 176 places, 167 transitions, 2024 flow [2024-06-21 18:13:34,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2024, PETRI_PLACES=176, PETRI_TRANSITIONS=167} [2024-06-21 18:13:34,133 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 18:13:34,133 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 167 transitions, 2024 flow [2024-06-21 18:13:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:34,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:34,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:13:34,134 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:34,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1767869804, now seen corresponding path program 3 times [2024-06-21 18:13:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342821347] [2024-06-21 18:13:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:34,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:34,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:34,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342821347] [2024-06-21 18:13:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342821347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:34,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:34,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:34,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043026522] [2024-06-21 18:13:34,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:34,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:34,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:34,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:34,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 167 transitions, 2024 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:34,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:34,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:34,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:34,792 INFO L124 PetriNetUnfolderBase]: 2570/4505 cut-off events. [2024-06-21 18:13:34,792 INFO L125 PetriNetUnfolderBase]: For 183183/183195 co-relation queries the response was YES. [2024-06-21 18:13:34,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25915 conditions, 4505 events. 2570/4505 cut-off events. For 183183/183195 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30843 event pairs, 1017 based on Foata normal form. 14/4518 useless extension candidates. Maximal degree in co-relation 25825. Up to 4014 conditions per place. [2024-06-21 18:13:34,828 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 132 selfloop transitions, 47 changer transitions 1/187 dead transitions. [2024-06-21 18:13:34,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 187 transitions, 2518 flow [2024-06-21 18:13:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 18:13:34,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-21 18:13:34,830 INFO L175 Difference]: Start difference. First operand has 176 places, 167 transitions, 2024 flow. Second operand 6 states and 148 transitions. [2024-06-21 18:13:34,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 187 transitions, 2518 flow [2024-06-21 18:13:35,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 187 transitions, 2475 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:35,142 INFO L231 Difference]: Finished difference. Result has 176 places, 166 transitions, 2075 flow [2024-06-21 18:13:35,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2075, PETRI_PLACES=176, PETRI_TRANSITIONS=166} [2024-06-21 18:13:35,142 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 18:13:35,142 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 166 transitions, 2075 flow [2024-06-21 18:13:35,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:35,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:35,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:13:35,143 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:35,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash 50417106, now seen corresponding path program 4 times [2024-06-21 18:13:35,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:35,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764356983] [2024-06-21 18:13:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:35,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:35,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764356983] [2024-06-21 18:13:35,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764356983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:35,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:35,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515630211] [2024-06-21 18:13:35,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:35,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:35,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:35,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 166 transitions, 2075 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:35,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:35,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:35,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:35,880 INFO L124 PetriNetUnfolderBase]: 2535/4440 cut-off events. [2024-06-21 18:13:35,880 INFO L125 PetriNetUnfolderBase]: For 189452/189464 co-relation queries the response was YES. [2024-06-21 18:13:35,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25801 conditions, 4440 events. 2535/4440 cut-off events. For 189452/189464 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30284 event pairs, 999 based on Foata normal form. 14/4453 useless extension candidates. Maximal degree in co-relation 25709. Up to 3955 conditions per place. [2024-06-21 18:13:35,923 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 130 selfloop transitions, 49 changer transitions 2/187 dead transitions. [2024-06-21 18:13:35,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 187 transitions, 2489 flow [2024-06-21 18:13:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 18:13:35,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413105413105413 [2024-06-21 18:13:35,924 INFO L175 Difference]: Start difference. First operand has 176 places, 166 transitions, 2075 flow. Second operand 9 states and 190 transitions. [2024-06-21 18:13:35,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 187 transitions, 2489 flow [2024-06-21 18:13:36,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 187 transitions, 2403 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:36,270 INFO L231 Difference]: Finished difference. Result has 180 places, 164 transitions, 2068 flow [2024-06-21 18:13:36,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2068, PETRI_PLACES=180, PETRI_TRANSITIONS=164} [2024-06-21 18:13:36,271 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 18:13:36,271 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 164 transitions, 2068 flow [2024-06-21 18:13:36,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:36,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:36,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:13:36,272 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:36,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1563719792, now seen corresponding path program 5 times [2024-06-21 18:13:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:36,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284201052] [2024-06-21 18:13:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:36,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:36,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284201052] [2024-06-21 18:13:36,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284201052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:36,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:36,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658076628] [2024-06-21 18:13:36,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:36,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:36,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:36,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:36,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 164 transitions, 2068 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:36,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:36,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:36,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:37,054 INFO L124 PetriNetUnfolderBase]: 2422/4239 cut-off events. [2024-06-21 18:13:37,054 INFO L125 PetriNetUnfolderBase]: For 187248/187254 co-relation queries the response was YES. [2024-06-21 18:13:37,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25024 conditions, 4239 events. 2422/4239 cut-off events. For 187248/187254 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28608 event pairs, 960 based on Foata normal form. 5/4242 useless extension candidates. Maximal degree in co-relation 24932. Up to 3730 conditions per place. [2024-06-21 18:13:37,093 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 112 selfloop transitions, 57 changer transitions 2/178 dead transitions. [2024-06-21 18:13:37,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 178 transitions, 2444 flow [2024-06-21 18:13:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:37,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 18:13:37,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824175824175825 [2024-06-21 18:13:37,094 INFO L175 Difference]: Start difference. First operand has 180 places, 164 transitions, 2068 flow. Second operand 7 states and 159 transitions. [2024-06-21 18:13:37,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 178 transitions, 2444 flow [2024-06-21 18:13:37,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 178 transitions, 2242 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 18:13:37,440 INFO L231 Difference]: Finished difference. Result has 174 places, 162 transitions, 1963 flow [2024-06-21 18:13:37,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1963, PETRI_PLACES=174, PETRI_TRANSITIONS=162} [2024-06-21 18:13:37,447 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 18:13:37,448 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 162 transitions, 1963 flow [2024-06-21 18:13:37,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:37,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:37,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:13:37,448 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:37,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:37,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1563716816, now seen corresponding path program 3 times [2024-06-21 18:13:37,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:37,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804592381] [2024-06-21 18:13:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:37,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:37,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804592381] [2024-06-21 18:13:37,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804592381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:37,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:37,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:37,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81907211] [2024-06-21 18:13:37,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:37,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:37,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:37,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:37,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 162 transitions, 1963 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:37,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:37,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:37,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:38,228 INFO L124 PetriNetUnfolderBase]: 2321/4072 cut-off events. [2024-06-21 18:13:38,229 INFO L125 PetriNetUnfolderBase]: For 184635/184637 co-relation queries the response was YES. [2024-06-21 18:13:38,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23990 conditions, 4072 events. 2321/4072 cut-off events. For 184635/184637 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27276 event pairs, 895 based on Foata normal form. 8/4078 useless extension candidates. Maximal degree in co-relation 23901. Up to 3666 conditions per place. [2024-06-21 18:13:38,259 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 151 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-21 18:13:38,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 177 transitions, 2358 flow [2024-06-21 18:13:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 18:13:38,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-21 18:13:38,261 INFO L175 Difference]: Start difference. First operand has 174 places, 162 transitions, 1963 flow. Second operand 6 states and 134 transitions. [2024-06-21 18:13:38,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 177 transitions, 2358 flow [2024-06-21 18:13:38,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 177 transitions, 2205 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:38,553 INFO L231 Difference]: Finished difference. Result has 172 places, 162 transitions, 1853 flow [2024-06-21 18:13:38,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1853, PETRI_PLACES=172, PETRI_TRANSITIONS=162} [2024-06-21 18:13:38,554 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-21 18:13:38,554 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 162 transitions, 1853 flow [2024-06-21 18:13:38,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:38,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:38,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:13:38,555 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:38,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash 709968416, now seen corresponding path program 1 times [2024-06-21 18:13:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:38,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839871038] [2024-06-21 18:13:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:38,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:38,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839871038] [2024-06-21 18:13:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839871038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:38,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241269428] [2024-06-21 18:13:38,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:38,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:38,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 162 transitions, 1853 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:38,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:38,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:38,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:39,285 INFO L124 PetriNetUnfolderBase]: 2341/4104 cut-off events. [2024-06-21 18:13:39,286 INFO L125 PetriNetUnfolderBase]: For 190527/190529 co-relation queries the response was YES. [2024-06-21 18:13:39,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24196 conditions, 4104 events. 2341/4104 cut-off events. For 190527/190529 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27519 event pairs, 879 based on Foata normal form. 6/4108 useless extension candidates. Maximal degree in co-relation 24106. Up to 3630 conditions per place. [2024-06-21 18:13:39,320 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 154 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-06-21 18:13:39,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 184 transitions, 2327 flow [2024-06-21 18:13:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 18:13:39,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854700854700855 [2024-06-21 18:13:39,322 INFO L175 Difference]: Start difference. First operand has 172 places, 162 transitions, 1853 flow. Second operand 6 states and 137 transitions. [2024-06-21 18:13:39,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 184 transitions, 2327 flow [2024-06-21 18:13:39,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 184 transitions, 2279 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:39,657 INFO L231 Difference]: Finished difference. Result has 174 places, 166 transitions, 1923 flow [2024-06-21 18:13:39,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1923, PETRI_PLACES=174, PETRI_TRANSITIONS=166} [2024-06-21 18:13:39,658 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 18:13:39,658 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 166 transitions, 1923 flow [2024-06-21 18:13:39,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:39,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:39,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:13:39,659 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:39,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 394517752, now seen corresponding path program 1 times [2024-06-21 18:13:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:39,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624246731] [2024-06-21 18:13:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:39,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:39,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:39,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624246731] [2024-06-21 18:13:39,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624246731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:39,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:39,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268805423] [2024-06-21 18:13:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:39,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:39,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:39,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:39,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 166 transitions, 1923 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:39,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:39,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:39,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:40,407 INFO L124 PetriNetUnfolderBase]: 2338/4101 cut-off events. [2024-06-21 18:13:40,407 INFO L125 PetriNetUnfolderBase]: For 193044/193056 co-relation queries the response was YES. [2024-06-21 18:13:40,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24430 conditions, 4101 events. 2338/4101 cut-off events. For 193044/193056 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27565 event pairs, 903 based on Foata normal form. 13/4108 useless extension candidates. Maximal degree in co-relation 24338. Up to 3663 conditions per place. [2024-06-21 18:13:40,442 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 142 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-06-21 18:13:40,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 183 transitions, 2407 flow [2024-06-21 18:13:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 18:13:40,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-21 18:13:40,443 INFO L175 Difference]: Start difference. First operand has 174 places, 166 transitions, 1923 flow. Second operand 6 states and 141 transitions. [2024-06-21 18:13:40,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 183 transitions, 2407 flow [2024-06-21 18:13:40,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 183 transitions, 2359 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:40,749 INFO L231 Difference]: Finished difference. Result has 178 places, 166 transitions, 1949 flow [2024-06-21 18:13:40,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1949, PETRI_PLACES=178, PETRI_TRANSITIONS=166} [2024-06-21 18:13:40,750 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-21 18:13:40,750 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 166 transitions, 1949 flow [2024-06-21 18:13:40,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:40,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:40,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:13:40,751 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:40,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:40,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2122860070, now seen corresponding path program 2 times [2024-06-21 18:13:40,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:40,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782343986] [2024-06-21 18:13:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:40,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:40,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782343986] [2024-06-21 18:13:40,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782343986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:40,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458915097] [2024-06-21 18:13:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:40,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:40,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:40,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 166 transitions, 1949 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:40,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:40,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:40,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:41,480 INFO L124 PetriNetUnfolderBase]: 2335/4104 cut-off events. [2024-06-21 18:13:41,480 INFO L125 PetriNetUnfolderBase]: For 199237/199245 co-relation queries the response was YES. [2024-06-21 18:13:41,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24517 conditions, 4104 events. 2335/4104 cut-off events. For 199237/199245 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27574 event pairs, 915 based on Foata normal form. 9/4111 useless extension candidates. Maximal degree in co-relation 24422. Up to 3660 conditions per place. [2024-06-21 18:13:41,516 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 132 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-21 18:13:41,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 176 transitions, 2313 flow [2024-06-21 18:13:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 18:13:41,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 18:13:41,517 INFO L175 Difference]: Start difference. First operand has 178 places, 166 transitions, 1949 flow. Second operand 7 states and 143 transitions. [2024-06-21 18:13:41,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 176 transitions, 2313 flow [2024-06-21 18:13:41,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 176 transitions, 2213 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:41,923 INFO L231 Difference]: Finished difference. Result has 180 places, 166 transitions, 1931 flow [2024-06-21 18:13:41,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1931, PETRI_PLACES=180, PETRI_TRANSITIONS=166} [2024-06-21 18:13:41,924 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 18:13:41,924 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 166 transitions, 1931 flow [2024-06-21 18:13:41,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:41,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:41,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:41,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:13:41,925 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:41,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:41,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1008470580, now seen corresponding path program 6 times [2024-06-21 18:13:41,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:41,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665491575] [2024-06-21 18:13:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:41,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:42,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:42,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665491575] [2024-06-21 18:13:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665491575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:42,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:42,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185362440] [2024-06-21 18:13:42,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:42,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:42,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 166 transitions, 1931 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:42,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:42,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:42,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:42,587 INFO L124 PetriNetUnfolderBase]: 2337/4104 cut-off events. [2024-06-21 18:13:42,587 INFO L125 PetriNetUnfolderBase]: For 207111/207119 co-relation queries the response was YES. [2024-06-21 18:13:42,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24632 conditions, 4104 events. 2337/4104 cut-off events. For 207111/207119 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27587 event pairs, 912 based on Foata normal form. 10/4112 useless extension candidates. Maximal degree in co-relation 24535. Up to 3571 conditions per place. [2024-06-21 18:13:42,623 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 106 selfloop transitions, 77 changer transitions 0/189 dead transitions. [2024-06-21 18:13:42,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 189 transitions, 2562 flow [2024-06-21 18:13:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 18:13:42,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-21 18:13:42,625 INFO L175 Difference]: Start difference. First operand has 180 places, 166 transitions, 1931 flow. Second operand 8 states and 179 transitions. [2024-06-21 18:13:42,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 189 transitions, 2562 flow [2024-06-21 18:13:43,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 189 transitions, 2451 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:43,012 INFO L231 Difference]: Finished difference. Result has 181 places, 169 transitions, 2014 flow [2024-06-21 18:13:43,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2014, PETRI_PLACES=181, PETRI_TRANSITIONS=169} [2024-06-21 18:13:43,013 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-21 18:13:43,013 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 169 transitions, 2014 flow [2024-06-21 18:13:43,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:43,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:43,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:13:43,014 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:43,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:43,014 INFO L85 PathProgramCache]: Analyzing trace with hash -763521838, now seen corresponding path program 7 times [2024-06-21 18:13:43,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:43,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285739121] [2024-06-21 18:13:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:43,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:43,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:43,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285739121] [2024-06-21 18:13:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285739121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:43,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:43,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027476563] [2024-06-21 18:13:43,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:43,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:43,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:43,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:43,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 169 transitions, 2014 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:43,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:43,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:43,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:43,603 INFO L124 PetriNetUnfolderBase]: 2334/4095 cut-off events. [2024-06-21 18:13:43,603 INFO L125 PetriNetUnfolderBase]: For 213399/213401 co-relation queries the response was YES. [2024-06-21 18:13:43,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24783 conditions, 4095 events. 2334/4095 cut-off events. For 213399/213401 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27546 event pairs, 944 based on Foata normal form. 1/4093 useless extension candidates. Maximal degree in co-relation 24687. Up to 3530 conditions per place. [2024-06-21 18:13:43,637 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 98 selfloop transitions, 83 changer transitions 0/188 dead transitions. [2024-06-21 18:13:43,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 188 transitions, 2678 flow [2024-06-21 18:13:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 18:13:43,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-21 18:13:43,638 INFO L175 Difference]: Start difference. First operand has 181 places, 169 transitions, 2014 flow. Second operand 7 states and 160 transitions. [2024-06-21 18:13:43,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 188 transitions, 2678 flow [2024-06-21 18:13:44,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 188 transitions, 2502 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:44,182 INFO L231 Difference]: Finished difference. Result has 183 places, 175 transitions, 2138 flow [2024-06-21 18:13:44,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2138, PETRI_PLACES=183, PETRI_TRANSITIONS=175} [2024-06-21 18:13:44,183 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 143 predicate places. [2024-06-21 18:13:44,183 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 175 transitions, 2138 flow [2024-06-21 18:13:44,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:44,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:44,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:13:44,183 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:44,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash -763524814, now seen corresponding path program 4 times [2024-06-21 18:13:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:44,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107985104] [2024-06-21 18:13:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:44,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:44,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107985104] [2024-06-21 18:13:44,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107985104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:44,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:44,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023663150] [2024-06-21 18:13:44,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:44,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:44,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:44,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 175 transitions, 2138 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:44,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:44,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:44,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:44,834 INFO L124 PetriNetUnfolderBase]: 2349/4126 cut-off events. [2024-06-21 18:13:44,834 INFO L125 PetriNetUnfolderBase]: For 230925/230927 co-relation queries the response was YES. [2024-06-21 18:13:44,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25866 conditions, 4126 events. 2349/4126 cut-off events. For 230925/230927 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27674 event pairs, 897 based on Foata normal form. 8/4132 useless extension candidates. Maximal degree in co-relation 25769. Up to 3708 conditions per place. [2024-06-21 18:13:44,870 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 161 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2024-06-21 18:13:44,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 192 transitions, 2587 flow [2024-06-21 18:13:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 18:13:44,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567765567765568 [2024-06-21 18:13:44,871 INFO L175 Difference]: Start difference. First operand has 183 places, 175 transitions, 2138 flow. Second operand 7 states and 152 transitions. [2024-06-21 18:13:44,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 192 transitions, 2587 flow [2024-06-21 18:13:45,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 192 transitions, 2482 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:45,345 INFO L231 Difference]: Finished difference. Result has 187 places, 176 transitions, 2106 flow [2024-06-21 18:13:45,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2106, PETRI_PLACES=187, PETRI_TRANSITIONS=176} [2024-06-21 18:13:45,346 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-21 18:13:45,346 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 176 transitions, 2106 flow [2024-06-21 18:13:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:45,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:45,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:13:45,346 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:45,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash -763155852, now seen corresponding path program 2 times [2024-06-21 18:13:45,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:45,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661656153] [2024-06-21 18:13:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:45,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:45,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661656153] [2024-06-21 18:13:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661656153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:45,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:45,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115155555] [2024-06-21 18:13:45,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:45,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:45,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:45,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 176 transitions, 2106 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:45,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:45,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:45,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:45,969 INFO L124 PetriNetUnfolderBase]: 2369/4162 cut-off events. [2024-06-21 18:13:45,969 INFO L125 PetriNetUnfolderBase]: For 238073/238075 co-relation queries the response was YES. [2024-06-21 18:13:45,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26271 conditions, 4162 events. 2369/4162 cut-off events. For 238073/238075 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27952 event pairs, 897 based on Foata normal form. 6/4166 useless extension candidates. Maximal degree in co-relation 26171. Up to 3710 conditions per place. [2024-06-21 18:13:46,007 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 165 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-21 18:13:46,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 198 transitions, 2613 flow [2024-06-21 18:13:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 18:13:46,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-21 18:13:46,008 INFO L175 Difference]: Start difference. First operand has 187 places, 176 transitions, 2106 flow. Second operand 7 states and 155 transitions. [2024-06-21 18:13:46,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 198 transitions, 2613 flow [2024-06-21 18:13:46,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 198 transitions, 2548 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:46,474 INFO L231 Difference]: Finished difference. Result has 190 places, 179 transitions, 2155 flow [2024-06-21 18:13:46,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2155, PETRI_PLACES=190, PETRI_TRANSITIONS=179} [2024-06-21 18:13:46,475 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-21 18:13:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 179 transitions, 2155 flow [2024-06-21 18:13:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:46,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:13:46,476 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash -817880318, now seen corresponding path program 3 times [2024-06-21 18:13:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:46,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080564289] [2024-06-21 18:13:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:46,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:46,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080564289] [2024-06-21 18:13:46,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080564289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:46,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:46,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:46,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817996124] [2024-06-21 18:13:46,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:46,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:46,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:46,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:46,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:46,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:46,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 179 transitions, 2155 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:46,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:46,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:46,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:47,171 INFO L124 PetriNetUnfolderBase]: 2356/4141 cut-off events. [2024-06-21 18:13:47,171 INFO L125 PetriNetUnfolderBase]: For 238860/238862 co-relation queries the response was YES. [2024-06-21 18:13:47,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25995 conditions, 4141 events. 2356/4141 cut-off events. For 238860/238862 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27846 event pairs, 876 based on Foata normal form. 6/4145 useless extension candidates. Maximal degree in co-relation 25894. Up to 3559 conditions per place. [2024-06-21 18:13:47,212 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 162 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-21 18:13:47,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 201 transitions, 2651 flow [2024-06-21 18:13:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 18:13:47,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-21 18:13:47,213 INFO L175 Difference]: Start difference. First operand has 190 places, 179 transitions, 2155 flow. Second operand 7 states and 155 transitions. [2024-06-21 18:13:47,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 201 transitions, 2651 flow [2024-06-21 18:13:47,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 201 transitions, 2580 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:47,778 INFO L231 Difference]: Finished difference. Result has 194 places, 181 transitions, 2186 flow [2024-06-21 18:13:47,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2186, PETRI_PLACES=194, PETRI_TRANSITIONS=181} [2024-06-21 18:13:47,779 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 154 predicate places. [2024-06-21 18:13:47,779 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 181 transitions, 2186 flow [2024-06-21 18:13:47,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:47,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:47,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:13:47,779 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:47,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1512274702, now seen corresponding path program 1 times [2024-06-21 18:13:47,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:47,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737476976] [2024-06-21 18:13:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:47,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:47,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:47,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737476976] [2024-06-21 18:13:47,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737476976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:47,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:47,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:47,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240228383] [2024-06-21 18:13:47,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:47,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:47,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:47,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 181 transitions, 2186 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:47,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:47,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:47,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:48,394 INFO L124 PetriNetUnfolderBase]: 2363/4149 cut-off events. [2024-06-21 18:13:48,394 INFO L125 PetriNetUnfolderBase]: For 244281/244281 co-relation queries the response was YES. [2024-06-21 18:13:48,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26099 conditions, 4149 events. 2363/4149 cut-off events. For 244281/244281 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27914 event pairs, 844 based on Foata normal form. 6/4150 useless extension candidates. Maximal degree in co-relation 25996. Up to 3658 conditions per place. [2024-06-21 18:13:48,429 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 183 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2024-06-21 18:13:48,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 205 transitions, 2798 flow [2024-06-21 18:13:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 18:13:48,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256410256410256 [2024-06-21 18:13:48,430 INFO L175 Difference]: Start difference. First operand has 194 places, 181 transitions, 2186 flow. Second operand 5 states and 122 transitions. [2024-06-21 18:13:48,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 205 transitions, 2798 flow [2024-06-21 18:13:49,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 205 transitions, 2635 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:49,042 INFO L231 Difference]: Finished difference. Result has 192 places, 182 transitions, 2076 flow [2024-06-21 18:13:49,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2076, PETRI_PLACES=192, PETRI_TRANSITIONS=182} [2024-06-21 18:13:49,042 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 152 predicate places. [2024-06-21 18:13:49,042 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 182 transitions, 2076 flow [2024-06-21 18:13:49,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:49,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:49,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:13:49,043 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:49,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2122429542, now seen corresponding path program 1 times [2024-06-21 18:13:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:49,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488902728] [2024-06-21 18:13:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:49,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:49,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488902728] [2024-06-21 18:13:49,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488902728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:49,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:49,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:49,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157477431] [2024-06-21 18:13:49,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:49,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:49,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:49,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:49,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 182 transitions, 2076 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:49,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:49,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:49,662 INFO L124 PetriNetUnfolderBase]: 2350/4130 cut-off events. [2024-06-21 18:13:49,662 INFO L125 PetriNetUnfolderBase]: For 243680/243680 co-relation queries the response was YES. [2024-06-21 18:13:49,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25454 conditions, 4130 events. 2350/4130 cut-off events. For 243680/243680 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27747 event pairs, 837 based on Foata normal form. 6/4131 useless extension candidates. Maximal degree in co-relation 25353. Up to 3652 conditions per place. [2024-06-21 18:13:49,699 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 182 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-06-21 18:13:49,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 204 transitions, 2561 flow [2024-06-21 18:13:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 18:13:49,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205128205128205 [2024-06-21 18:13:49,700 INFO L175 Difference]: Start difference. First operand has 192 places, 182 transitions, 2076 flow. Second operand 5 states and 121 transitions. [2024-06-21 18:13:49,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 204 transitions, 2561 flow [2024-06-21 18:13:50,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 204 transitions, 2534 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:50,254 INFO L231 Difference]: Finished difference. Result has 195 places, 182 transitions, 2083 flow [2024-06-21 18:13:50,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2083, PETRI_PLACES=195, PETRI_TRANSITIONS=182} [2024-06-21 18:13:50,254 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 155 predicate places. [2024-06-21 18:13:50,254 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 182 transitions, 2083 flow [2024-06-21 18:13:50,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:50,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:50,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:13:50,255 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:50,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 609395152, now seen corresponding path program 1 times [2024-06-21 18:13:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755325290] [2024-06-21 18:13:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:50,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:50,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755325290] [2024-06-21 18:13:50,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755325290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:50,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:50,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:50,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190654092] [2024-06-21 18:13:50,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:50,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:50,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:50,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:50,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:50,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:50,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 182 transitions, 2083 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:50,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:50,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:50,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:51,056 INFO L124 PetriNetUnfolderBase]: 2355/4146 cut-off events. [2024-06-21 18:13:51,056 INFO L125 PetriNetUnfolderBase]: For 237035/237047 co-relation queries the response was YES. [2024-06-21 18:13:51,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25510 conditions, 4146 events. 2355/4146 cut-off events. For 237035/237047 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27891 event pairs, 907 based on Foata normal form. 13/4153 useless extension candidates. Maximal degree in co-relation 25407. Up to 3605 conditions per place. [2024-06-21 18:13:51,090 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 138 selfloop transitions, 76 changer transitions 0/220 dead transitions. [2024-06-21 18:13:51,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 220 transitions, 2839 flow [2024-06-21 18:13:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-21 18:13:51,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547785547785548 [2024-06-21 18:13:51,092 INFO L175 Difference]: Start difference. First operand has 195 places, 182 transitions, 2083 flow. Second operand 11 states and 238 transitions. [2024-06-21 18:13:51,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 220 transitions, 2839 flow [2024-06-21 18:13:51,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 220 transitions, 2798 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:51,683 INFO L231 Difference]: Finished difference. Result has 202 places, 185 transitions, 2230 flow [2024-06-21 18:13:51,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2230, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2024-06-21 18:13:51,684 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 162 predicate places. [2024-06-21 18:13:51,684 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 2230 flow [2024-06-21 18:13:51,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:51,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:51,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:13:51,685 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:51,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash 864018936, now seen corresponding path program 2 times [2024-06-21 18:13:51,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:51,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857765854] [2024-06-21 18:13:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:51,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:51,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:51,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857765854] [2024-06-21 18:13:51,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857765854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:51,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:51,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:51,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450999134] [2024-06-21 18:13:51,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:51,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:51,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:51,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:51,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:51,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 185 transitions, 2230 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:51,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:51,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:51,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:52,451 INFO L124 PetriNetUnfolderBase]: 2352/4142 cut-off events. [2024-06-21 18:13:52,451 INFO L125 PetriNetUnfolderBase]: For 244053/244065 co-relation queries the response was YES. [2024-06-21 18:13:52,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25703 conditions, 4142 events. 2352/4142 cut-off events. For 244053/244065 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27894 event pairs, 907 based on Foata normal form. 13/4149 useless extension candidates. Maximal degree in co-relation 25598. Up to 3602 conditions per place. [2024-06-21 18:13:52,487 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 137 selfloop transitions, 76 changer transitions 0/219 dead transitions. [2024-06-21 18:13:52,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 219 transitions, 2848 flow [2024-06-21 18:13:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-21 18:13:52,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-06-21 18:13:52,489 INFO L175 Difference]: Start difference. First operand has 202 places, 185 transitions, 2230 flow. Second operand 12 states and 250 transitions. [2024-06-21 18:13:52,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 219 transitions, 2848 flow [2024-06-21 18:13:53,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 219 transitions, 2650 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:53,018 INFO L231 Difference]: Finished difference. Result has 205 places, 185 transitions, 2192 flow [2024-06-21 18:13:53,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2192, PETRI_PLACES=205, PETRI_TRANSITIONS=185} [2024-06-21 18:13:53,018 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-21 18:13:53,018 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 185 transitions, 2192 flow [2024-06-21 18:13:53,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:53,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:53,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:13:53,019 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:53,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash -580693968, now seen corresponding path program 3 times [2024-06-21 18:13:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:53,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62008104] [2024-06-21 18:13:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:53,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:53,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62008104] [2024-06-21 18:13:53,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62008104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:53,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:53,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:53,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351659493] [2024-06-21 18:13:53,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:53,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:53,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:53,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:53,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:53,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:53,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 185 transitions, 2192 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:53,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:53,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:53,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:53,774 INFO L124 PetriNetUnfolderBase]: 2357/4155 cut-off events. [2024-06-21 18:13:53,774 INFO L125 PetriNetUnfolderBase]: For 244057/244065 co-relation queries the response was YES. [2024-06-21 18:13:53,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25724 conditions, 4155 events. 2357/4155 cut-off events. For 244057/244065 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28016 event pairs, 910 based on Foata normal form. 9/4162 useless extension candidates. Maximal degree in co-relation 25618. Up to 3608 conditions per place. [2024-06-21 18:13:53,812 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 121 selfloop transitions, 83 changer transitions 0/210 dead transitions. [2024-06-21 18:13:53,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 210 transitions, 2795 flow [2024-06-21 18:13:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-21 18:13:53,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291375291375291 [2024-06-21 18:13:53,813 INFO L175 Difference]: Start difference. First operand has 205 places, 185 transitions, 2192 flow. Second operand 11 states and 227 transitions. [2024-06-21 18:13:53,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 210 transitions, 2795 flow [2024-06-21 18:13:54,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 210 transitions, 2633 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:54,183 INFO L231 Difference]: Finished difference. Result has 205 places, 188 transitions, 2239 flow [2024-06-21 18:13:54,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2239, PETRI_PLACES=205, PETRI_TRANSITIONS=188} [2024-06-21 18:13:54,183 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-21 18:13:54,184 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 188 transitions, 2239 flow [2024-06-21 18:13:54,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:54,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:54,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:54,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:13:54,184 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:54,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1197823746, now seen corresponding path program 4 times [2024-06-21 18:13:54,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:54,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917207988] [2024-06-21 18:13:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:54,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:54,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:54,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917207988] [2024-06-21 18:13:54,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917207988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:54,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:54,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:13:54,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624904747] [2024-06-21 18:13:54,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:54,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:13:54,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:13:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:13:54,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-21 18:13:54,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 188 transitions, 2239 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:54,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:54,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-21 18:13:54,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:54,939 INFO L124 PetriNetUnfolderBase]: 2354/4151 cut-off events. [2024-06-21 18:13:54,939 INFO L125 PetriNetUnfolderBase]: For 242643/242651 co-relation queries the response was YES. [2024-06-21 18:13:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25651 conditions, 4151 events. 2354/4151 cut-off events. For 242643/242651 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28014 event pairs, 910 based on Foata normal form. 9/4158 useless extension candidates. Maximal degree in co-relation 25544. Up to 3605 conditions per place. [2024-06-21 18:13:54,975 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 120 selfloop transitions, 83 changer transitions 0/209 dead transitions. [2024-06-21 18:13:54,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 209 transitions, 2695 flow [2024-06-21 18:13:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:13:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:13:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-21 18:13:54,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106837606837606 [2024-06-21 18:13:54,976 INFO L175 Difference]: Start difference. First operand has 205 places, 188 transitions, 2239 flow. Second operand 12 states and 239 transitions. [2024-06-21 18:13:54,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 209 transitions, 2695 flow [2024-06-21 18:13:55,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 209 transitions, 2505 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:55,626 INFO L231 Difference]: Finished difference. Result has 208 places, 188 transitions, 2221 flow [2024-06-21 18:13:55,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2221, PETRI_PLACES=208, PETRI_TRANSITIONS=188} [2024-06-21 18:13:55,627 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 168 predicate places. [2024-06-21 18:13:55,627 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 188 transitions, 2221 flow [2024-06-21 18:13:55,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:55,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:55,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:55,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:13:55,628 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:55,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 476558218, now seen corresponding path program 5 times [2024-06-21 18:13:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:55,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660970281] [2024-06-21 18:13:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:55,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:55,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:55,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660970281] [2024-06-21 18:13:55,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660970281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:55,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:55,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:55,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463106920] [2024-06-21 18:13:55,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:55,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:55,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:55,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:55,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:55,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 188 transitions, 2221 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:55,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:55,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:55,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:56,267 INFO L124 PetriNetUnfolderBase]: 2351/4144 cut-off events. [2024-06-21 18:13:56,268 INFO L125 PetriNetUnfolderBase]: For 249458/249460 co-relation queries the response was YES. [2024-06-21 18:13:56,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25700 conditions, 4144 events. 2351/4144 cut-off events. For 249458/249460 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27938 event pairs, 941 based on Foata normal form. 1/4142 useless extension candidates. Maximal degree in co-relation 25593. Up to 3565 conditions per place. [2024-06-21 18:13:56,304 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 105 selfloop transitions, 90 changer transitions 0/202 dead transitions. [2024-06-21 18:13:56,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 202 transitions, 2643 flow [2024-06-21 18:13:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 18:13:56,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541025641025641 [2024-06-21 18:13:56,305 INFO L175 Difference]: Start difference. First operand has 208 places, 188 transitions, 2221 flow. Second operand 10 states and 211 transitions. [2024-06-21 18:13:56,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 202 transitions, 2643 flow [2024-06-21 18:13:56,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 202 transitions, 2477 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 18:13:56,854 INFO L231 Difference]: Finished difference. Result has 207 places, 188 transitions, 2241 flow [2024-06-21 18:13:56,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2241, PETRI_PLACES=207, PETRI_TRANSITIONS=188} [2024-06-21 18:13:56,855 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 167 predicate places. [2024-06-21 18:13:56,855 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 188 transitions, 2241 flow [2024-06-21 18:13:56,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:56,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:56,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:56,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:13:56,856 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:56,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1197821225, now seen corresponding path program 1 times [2024-06-21 18:13:56,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:56,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897880948] [2024-06-21 18:13:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:56,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:56,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:56,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897880948] [2024-06-21 18:13:56,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897880948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:56,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:56,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:56,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623125747] [2024-06-21 18:13:56,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:56,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:56,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:56,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:57,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:57,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 188 transitions, 2241 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:57,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:57,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:57,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:57,568 INFO L124 PetriNetUnfolderBase]: 2338/4121 cut-off events. [2024-06-21 18:13:57,568 INFO L125 PetriNetUnfolderBase]: For 265634/265646 co-relation queries the response was YES. [2024-06-21 18:13:57,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24849 conditions, 4121 events. 2338/4121 cut-off events. For 265634/265646 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27611 event pairs, 731 based on Foata normal form. 36/4156 useless extension candidates. Maximal degree in co-relation 24742. Up to 1560 conditions per place. [2024-06-21 18:13:57,603 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 161 selfloop transitions, 57 changer transitions 14/239 dead transitions. [2024-06-21 18:13:57,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 239 transitions, 3139 flow [2024-06-21 18:13:57,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 18:13:57,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381766381766382 [2024-06-21 18:13:57,605 INFO L175 Difference]: Start difference. First operand has 207 places, 188 transitions, 2241 flow. Second operand 9 states and 224 transitions. [2024-06-21 18:13:57,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 239 transitions, 3139 flow [2024-06-21 18:13:58,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 239 transitions, 2896 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:58,262 INFO L231 Difference]: Finished difference. Result has 207 places, 184 transitions, 2079 flow [2024-06-21 18:13:58,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2079, PETRI_PLACES=207, PETRI_TRANSITIONS=184} [2024-06-21 18:13:58,262 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 167 predicate places. [2024-06-21 18:13:58,263 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 184 transitions, 2079 flow [2024-06-21 18:13:58,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:58,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:58,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:58,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:13:58,263 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:58,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1442184741, now seen corresponding path program 2 times [2024-06-21 18:13:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:58,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844734795] [2024-06-21 18:13:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:58,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:58,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:58,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844734795] [2024-06-21 18:13:58,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844734795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:58,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:58,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002891018] [2024-06-21 18:13:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:58,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:58,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:58,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:58,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:58,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:58,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 184 transitions, 2079 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:58,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:58,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:58,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:59,006 INFO L124 PetriNetUnfolderBase]: 2516/4353 cut-off events. [2024-06-21 18:13:59,007 INFO L125 PetriNetUnfolderBase]: For 344717/344729 co-relation queries the response was YES. [2024-06-21 18:13:59,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29443 conditions, 4353 events. 2516/4353 cut-off events. For 344717/344729 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29029 event pairs, 785 based on Foata normal form. 18/4370 useless extension candidates. Maximal degree in co-relation 29336. Up to 1768 conditions per place. [2024-06-21 18:13:59,044 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 152 selfloop transitions, 62 changer transitions 11/232 dead transitions. [2024-06-21 18:13:59,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 232 transitions, 2975 flow [2024-06-21 18:13:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 18:13:59,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-21 18:13:59,046 INFO L175 Difference]: Start difference. First operand has 207 places, 184 transitions, 2079 flow. Second operand 9 states and 219 transitions. [2024-06-21 18:13:59,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 232 transitions, 2975 flow [2024-06-21 18:13:59,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 232 transitions, 2844 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:59,517 INFO L231 Difference]: Finished difference. Result has 207 places, 183 transitions, 2088 flow [2024-06-21 18:13:59,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2088, PETRI_PLACES=207, PETRI_TRANSITIONS=183} [2024-06-21 18:13:59,517 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 167 predicate places. [2024-06-21 18:13:59,517 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 183 transitions, 2088 flow [2024-06-21 18:13:59,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:59,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:59,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:59,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:13:59,518 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:59,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1389806211, now seen corresponding path program 3 times [2024-06-21 18:13:59,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:59,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947442346] [2024-06-21 18:13:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:59,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:59,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947442346] [2024-06-21 18:13:59,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947442346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:59,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:59,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:59,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168358977] [2024-06-21 18:13:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:13:59,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 183 transitions, 2088 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:59,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:59,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:13:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:00,286 INFO L124 PetriNetUnfolderBase]: 2399/4179 cut-off events. [2024-06-21 18:14:00,287 INFO L125 PetriNetUnfolderBase]: For 323561/323573 co-relation queries the response was YES. [2024-06-21 18:14:00,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26906 conditions, 4179 events. 2399/4179 cut-off events. For 323561/323573 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27988 event pairs, 870 based on Foata normal form. 42/4220 useless extension candidates. Maximal degree in co-relation 26799. Up to 2889 conditions per place. [2024-06-21 18:14:00,323 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 150 selfloop transitions, 53 changer transitions 18/228 dead transitions. [2024-06-21 18:14:00,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 228 transitions, 2808 flow [2024-06-21 18:14:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-21 18:14:00,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-06-21 18:14:00,325 INFO L175 Difference]: Start difference. First operand has 207 places, 183 transitions, 2088 flow. Second operand 10 states and 237 transitions. [2024-06-21 18:14:00,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 228 transitions, 2808 flow [2024-06-21 18:14:00,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 228 transitions, 2677 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:00,984 INFO L231 Difference]: Finished difference. Result has 205 places, 175 transitions, 1980 flow [2024-06-21 18:14:00,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1980, PETRI_PLACES=205, PETRI_TRANSITIONS=175} [2024-06-21 18:14:00,984 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-21 18:14:00,985 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 175 transitions, 1980 flow [2024-06-21 18:14:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:00,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:00,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:00,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:14:00,985 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:00,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1306210779, now seen corresponding path program 4 times [2024-06-21 18:14:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:00,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457516455] [2024-06-21 18:14:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:01,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:01,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457516455] [2024-06-21 18:14:01,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457516455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:01,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:01,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:01,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491356279] [2024-06-21 18:14:01,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:01,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:01,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:01,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 175 transitions, 1980 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:01,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:01,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:01,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:01,655 INFO L124 PetriNetUnfolderBase]: 2157/3760 cut-off events. [2024-06-21 18:14:01,656 INFO L125 PetriNetUnfolderBase]: For 277882/277894 co-relation queries the response was YES. [2024-06-21 18:14:01,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23692 conditions, 3760 events. 2157/3760 cut-off events. For 277882/277894 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24716 event pairs, 804 based on Foata normal form. 46/3805 useless extension candidates. Maximal degree in co-relation 23587. Up to 3145 conditions per place. [2024-06-21 18:14:01,691 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 134 selfloop transitions, 47 changer transitions 23/211 dead transitions. [2024-06-21 18:14:01,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 211 transitions, 2518 flow [2024-06-21 18:14:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:01,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 18:14:01,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-06-21 18:14:01,693 INFO L175 Difference]: Start difference. First operand has 205 places, 175 transitions, 1980 flow. Second operand 10 states and 226 transitions. [2024-06-21 18:14:01,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 211 transitions, 2518 flow [2024-06-21 18:14:02,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 211 transitions, 2405 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:02,213 INFO L231 Difference]: Finished difference. Result has 202 places, 168 transitions, 1897 flow [2024-06-21 18:14:02,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1897, PETRI_PLACES=202, PETRI_TRANSITIONS=168} [2024-06-21 18:14:02,214 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 162 predicate places. [2024-06-21 18:14:02,214 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 168 transitions, 1897 flow [2024-06-21 18:14:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:02,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:02,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:02,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:14:02,215 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:02,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1795503653, now seen corresponding path program 5 times [2024-06-21 18:14:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:02,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264244578] [2024-06-21 18:14:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:02,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:02,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:02,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264244578] [2024-06-21 18:14:02,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264244578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:02,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:02,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:02,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35978604] [2024-06-21 18:14:02,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:02,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:02,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:02,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:02,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:02,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:02,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 168 transitions, 1897 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:02,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:02,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:02,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:02,886 INFO L124 PetriNetUnfolderBase]: 2280/3915 cut-off events. [2024-06-21 18:14:02,887 INFO L125 PetriNetUnfolderBase]: For 282465/282476 co-relation queries the response was YES. [2024-06-21 18:14:02,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26335 conditions, 3915 events. 2280/3915 cut-off events. For 282465/282476 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 25633 event pairs, 834 based on Foata normal form. 19/3933 useless extension candidates. Maximal degree in co-relation 26232. Up to 3131 conditions per place. [2024-06-21 18:14:02,920 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 141 selfloop transitions, 47 changer transitions 9/204 dead transitions. [2024-06-21 18:14:02,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 204 transitions, 2565 flow [2024-06-21 18:14:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 18:14:02,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 18:14:02,921 INFO L175 Difference]: Start difference. First operand has 202 places, 168 transitions, 1897 flow. Second operand 9 states and 207 transitions. [2024-06-21 18:14:02,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 204 transitions, 2565 flow [2024-06-21 18:14:03,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 204 transitions, 2451 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:03,407 INFO L231 Difference]: Finished difference. Result has 196 places, 167 transitions, 1882 flow [2024-06-21 18:14:03,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1882, PETRI_PLACES=196, PETRI_TRANSITIONS=167} [2024-06-21 18:14:03,408 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 156 predicate places. [2024-06-21 18:14:03,408 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 167 transitions, 1882 flow [2024-06-21 18:14:03,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:03,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:03,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:03,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:14:03,409 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:03,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1792646693, now seen corresponding path program 6 times [2024-06-21 18:14:03,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:03,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516391662] [2024-06-21 18:14:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:03,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:03,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516391662] [2024-06-21 18:14:03,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516391662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:03,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:03,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:03,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548774595] [2024-06-21 18:14:03,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:03,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:03,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:03,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:03,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:03,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 167 transitions, 1882 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:03,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:03,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:03,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:04,048 INFO L124 PetriNetUnfolderBase]: 2202/3816 cut-off events. [2024-06-21 18:14:04,048 INFO L125 PetriNetUnfolderBase]: For 243048/243059 co-relation queries the response was YES. [2024-06-21 18:14:04,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24920 conditions, 3816 events. 2202/3816 cut-off events. For 243048/243059 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25092 event pairs, 853 based on Foata normal form. 19/3834 useless extension candidates. Maximal degree in co-relation 24819. Up to 3368 conditions per place. [2024-06-21 18:14:04,079 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 130 selfloop transitions, 41 changer transitions 15/193 dead transitions. [2024-06-21 18:14:04,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 193 transitions, 2336 flow [2024-06-21 18:14:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 18:14:04,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-21 18:14:04,094 INFO L175 Difference]: Start difference. First operand has 196 places, 167 transitions, 1882 flow. Second operand 9 states and 200 transitions. [2024-06-21 18:14:04,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 193 transitions, 2336 flow [2024-06-21 18:14:04,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 193 transitions, 2239 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:04,580 INFO L231 Difference]: Finished difference. Result has 195 places, 161 transitions, 1788 flow [2024-06-21 18:14:04,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1788, PETRI_PLACES=195, PETRI_TRANSITIONS=161} [2024-06-21 18:14:04,581 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 155 predicate places. [2024-06-21 18:14:04,581 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 161 transitions, 1788 flow [2024-06-21 18:14:04,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:04,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:04,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:04,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:14:04,582 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:04,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash 56658365, now seen corresponding path program 7 times [2024-06-21 18:14:04,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:04,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429388592] [2024-06-21 18:14:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:04,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:04,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:04,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429388592] [2024-06-21 18:14:04,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429388592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:04,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:04,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:04,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684310572] [2024-06-21 18:14:04,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:04,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:04,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:04,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:04,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:04,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:04,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 161 transitions, 1788 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:04,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:04,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:04,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:05,342 INFO L124 PetriNetUnfolderBase]: 2102/3652 cut-off events. [2024-06-21 18:14:05,343 INFO L125 PetriNetUnfolderBase]: For 223883/223887 co-relation queries the response was YES. [2024-06-21 18:14:05,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22439 conditions, 3652 events. 2102/3652 cut-off events. For 223883/223887 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24002 event pairs, 686 based on Foata normal form. 34/3685 useless extension candidates. Maximal degree in co-relation 22339. Up to 2035 conditions per place. [2024-06-21 18:14:05,373 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 131 selfloop transitions, 32 changer transitions 21/191 dead transitions. [2024-06-21 18:14:05,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 191 transitions, 2382 flow [2024-06-21 18:14:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 18:14:05,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-21 18:14:05,375 INFO L175 Difference]: Start difference. First operand has 195 places, 161 transitions, 1788 flow. Second operand 7 states and 171 transitions. [2024-06-21 18:14:05,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 191 transitions, 2382 flow [2024-06-21 18:14:05,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 2274 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:05,652 INFO L231 Difference]: Finished difference. Result has 188 places, 150 transitions, 1622 flow [2024-06-21 18:14:05,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1622, PETRI_PLACES=188, PETRI_TRANSITIONS=150} [2024-06-21 18:14:05,653 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 148 predicate places. [2024-06-21 18:14:05,653 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 150 transitions, 1622 flow [2024-06-21 18:14:05,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:05,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:05,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:14:05,654 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:05,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:05,654 INFO L85 PathProgramCache]: Analyzing trace with hash 234153143, now seen corresponding path program 1 times [2024-06-21 18:14:05,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:05,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855102180] [2024-06-21 18:14:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:05,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:05,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:05,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855102180] [2024-06-21 18:14:05,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855102180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:05,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:05,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:05,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951635596] [2024-06-21 18:14:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:05,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:05,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:05,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:05,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 150 transitions, 1622 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:05,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:05,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:05,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:06,346 INFO L124 PetriNetUnfolderBase]: 1868/3252 cut-off events. [2024-06-21 18:14:06,347 INFO L125 PetriNetUnfolderBase]: For 193528/193532 co-relation queries the response was YES. [2024-06-21 18:14:06,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20998 conditions, 3252 events. 1868/3252 cut-off events. For 193528/193532 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21016 event pairs, 620 based on Foata normal form. 10/3261 useless extension candidates. Maximal degree in co-relation 20900. Up to 2685 conditions per place. [2024-06-21 18:14:06,370 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 132 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-06-21 18:14:06,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 173 transitions, 2164 flow [2024-06-21 18:14:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 18:14:06,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:14:06,371 INFO L175 Difference]: Start difference. First operand has 188 places, 150 transitions, 1622 flow. Second operand 6 states and 144 transitions. [2024-06-21 18:14:06,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 173 transitions, 2164 flow [2024-06-21 18:14:06,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 173 transitions, 2069 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:06,646 INFO L231 Difference]: Finished difference. Result has 178 places, 152 transitions, 1647 flow [2024-06-21 18:14:06,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1647, PETRI_PLACES=178, PETRI_TRANSITIONS=152} [2024-06-21 18:14:06,646 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-21 18:14:06,646 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 152 transitions, 1647 flow [2024-06-21 18:14:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:06,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:06,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:06,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:14:06,647 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:06,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash 65229245, now seen corresponding path program 8 times [2024-06-21 18:14:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:06,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736799102] [2024-06-21 18:14:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:06,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736799102] [2024-06-21 18:14:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736799102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:06,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:06,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466024854] [2024-06-21 18:14:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:06,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:06,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:06,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 152 transitions, 1647 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:06,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:06,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:06,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:07,213 INFO L124 PetriNetUnfolderBase]: 1799/3139 cut-off events. [2024-06-21 18:14:07,214 INFO L125 PetriNetUnfolderBase]: For 165379/165383 co-relation queries the response was YES. [2024-06-21 18:14:07,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18654 conditions, 3139 events. 1799/3139 cut-off events. For 165379/165383 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20081 event pairs, 683 based on Foata normal form. 38/3176 useless extension candidates. Maximal degree in co-relation 18561. Up to 2613 conditions per place. [2024-06-21 18:14:07,237 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 118 selfloop transitions, 26 changer transitions 21/172 dead transitions. [2024-06-21 18:14:07,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 172 transitions, 2053 flow [2024-06-21 18:14:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 18:14:07,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 18:14:07,239 INFO L175 Difference]: Start difference. First operand has 178 places, 152 transitions, 1647 flow. Second operand 7 states and 161 transitions. [2024-06-21 18:14:07,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 172 transitions, 2053 flow [2024-06-21 18:14:07,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 172 transitions, 2003 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:07,484 INFO L231 Difference]: Finished difference. Result has 182 places, 142 transitions, 1539 flow [2024-06-21 18:14:07,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1539, PETRI_PLACES=182, PETRI_TRANSITIONS=142} [2024-06-21 18:14:07,486 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 142 predicate places. [2024-06-21 18:14:07,486 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 142 transitions, 1539 flow [2024-06-21 18:14:07,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:07,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:07,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:07,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:14:07,486 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:07,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash 352116575, now seen corresponding path program 9 times [2024-06-21 18:14:07,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:07,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401466939] [2024-06-21 18:14:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:07,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:07,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:07,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401466939] [2024-06-21 18:14:07,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401466939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:07,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:07,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:07,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675520864] [2024-06-21 18:14:07,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:07,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:07,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:07,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:07,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:07,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 142 transitions, 1539 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:07,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:07,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:07,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:08,024 INFO L124 PetriNetUnfolderBase]: 1578/2746 cut-off events. [2024-06-21 18:14:08,024 INFO L125 PetriNetUnfolderBase]: For 128790/128794 co-relation queries the response was YES. [2024-06-21 18:14:08,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15464 conditions, 2746 events. 1578/2746 cut-off events. For 128790/128794 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16960 event pairs, 558 based on Foata normal form. 38/2783 useless extension candidates. Maximal degree in co-relation 15370. Up to 2250 conditions per place. [2024-06-21 18:14:08,044 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 120 selfloop transitions, 25 changer transitions 7/159 dead transitions. [2024-06-21 18:14:08,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 159 transitions, 1911 flow [2024-06-21 18:14:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 18:14:08,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-21 18:14:08,049 INFO L175 Difference]: Start difference. First operand has 182 places, 142 transitions, 1539 flow. Second operand 7 states and 155 transitions. [2024-06-21 18:14:08,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 159 transitions, 1911 flow [2024-06-21 18:14:08,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 159 transitions, 1833 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:08,200 INFO L231 Difference]: Finished difference. Result has 171 places, 137 transitions, 1457 flow [2024-06-21 18:14:08,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1457, PETRI_PLACES=171, PETRI_TRANSITIONS=137} [2024-06-21 18:14:08,200 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-21 18:14:08,200 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 137 transitions, 1457 flow [2024-06-21 18:14:08,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:08,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:08,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:08,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:14:08,201 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:08,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash 352485537, now seen corresponding path program 1 times [2024-06-21 18:14:08,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:08,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404345650] [2024-06-21 18:14:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:08,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404345650] [2024-06-21 18:14:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404345650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:08,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:08,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838827935] [2024-06-21 18:14:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:08,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:08,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:08,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:08,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 137 transitions, 1457 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:08,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:08,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:08,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:08,822 INFO L124 PetriNetUnfolderBase]: 1498/2624 cut-off events. [2024-06-21 18:14:08,823 INFO L125 PetriNetUnfolderBase]: For 104763/104767 co-relation queries the response was YES. [2024-06-21 18:14:08,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14638 conditions, 2624 events. 1498/2624 cut-off events. For 104763/104767 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16138 event pairs, 383 based on Foata normal form. 34/2657 useless extension candidates. Maximal degree in co-relation 14550. Up to 2022 conditions per place. [2024-06-21 18:14:08,842 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 122 selfloop transitions, 32 changer transitions 5/166 dead transitions. [2024-06-21 18:14:08,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 166 transitions, 1960 flow [2024-06-21 18:14:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 18:14:08,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-21 18:14:08,843 INFO L175 Difference]: Start difference. First operand has 171 places, 137 transitions, 1457 flow. Second operand 8 states and 179 transitions. [2024-06-21 18:14:08,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 166 transitions, 1960 flow [2024-06-21 18:14:08,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 166 transitions, 1880 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 18:14:08,977 INFO L231 Difference]: Finished difference. Result has 167 places, 140 transitions, 1519 flow [2024-06-21 18:14:08,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=167, PETRI_TRANSITIONS=140} [2024-06-21 18:14:08,977 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-21 18:14:08,977 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 140 transitions, 1519 flow [2024-06-21 18:14:08,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:08,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:08,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:08,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:14:08,978 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:08,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash 352485723, now seen corresponding path program 1 times [2024-06-21 18:14:08,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:08,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675758064] [2024-06-21 18:14:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:08,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:09,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:09,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675758064] [2024-06-21 18:14:09,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675758064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:09,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:09,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:09,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743487716] [2024-06-21 18:14:09,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:09,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:09,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:09,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 140 transitions, 1519 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:09,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:09,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:09,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:09,387 INFO L124 PetriNetUnfolderBase]: 1384/2428 cut-off events. [2024-06-21 18:14:09,388 INFO L125 PetriNetUnfolderBase]: For 74681/74683 co-relation queries the response was YES. [2024-06-21 18:14:09,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13590 conditions, 2428 events. 1384/2428 cut-off events. For 74681/74683 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14614 event pairs, 371 based on Foata normal form. 8/2435 useless extension candidates. Maximal degree in co-relation 13504. Up to 1930 conditions per place. [2024-06-21 18:14:09,405 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 119 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-06-21 18:14:09,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 160 transitions, 1901 flow [2024-06-21 18:14:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 18:14:09,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-21 18:14:09,406 INFO L175 Difference]: Start difference. First operand has 167 places, 140 transitions, 1519 flow. Second operand 6 states and 142 transitions. [2024-06-21 18:14:09,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 160 transitions, 1901 flow [2024-06-21 18:14:09,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 160 transitions, 1816 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:09,529 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1510 flow [2024-06-21 18:14:09,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1510, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-21 18:14:09,530 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-21 18:14:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1510 flow [2024-06-21 18:14:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:09,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:09,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:09,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:14:09,531 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:09,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash -964200035, now seen corresponding path program 2 times [2024-06-21 18:14:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:09,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250798993] [2024-06-21 18:14:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:09,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:09,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250798993] [2024-06-21 18:14:09,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250798993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:09,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:09,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431158912] [2024-06-21 18:14:09,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:09,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:09,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:09,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:09,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1510 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:09,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:09,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:09,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:09,954 INFO L124 PetriNetUnfolderBase]: 1344/2320 cut-off events. [2024-06-21 18:14:09,954 INFO L125 PetriNetUnfolderBase]: For 70258/70260 co-relation queries the response was YES. [2024-06-21 18:14:09,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12805 conditions, 2320 events. 1344/2320 cut-off events. For 70258/70260 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13593 event pairs, 423 based on Foata normal form. 10/2329 useless extension candidates. Maximal degree in co-relation 12720. Up to 1938 conditions per place. [2024-06-21 18:14:09,970 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 22 changer transitions 9/161 dead transitions. [2024-06-21 18:14:09,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 1984 flow [2024-06-21 18:14:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 18:14:09,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 18:14:09,971 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1510 flow. Second operand 8 states and 173 transitions. [2024-06-21 18:14:09,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 1984 flow [2024-06-21 18:14:10,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 161 transitions, 1884 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:10,115 INFO L231 Difference]: Finished difference. Result has 168 places, 136 transitions, 1408 flow [2024-06-21 18:14:10,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1408, PETRI_PLACES=168, PETRI_TRANSITIONS=136} [2024-06-21 18:14:10,115 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 128 predicate places. [2024-06-21 18:14:10,115 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 136 transitions, 1408 flow [2024-06-21 18:14:10,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:10,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:10,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:10,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:14:10,116 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:10,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -503787249, now seen corresponding path program 3 times [2024-06-21 18:14:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:10,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633209602] [2024-06-21 18:14:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:10,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:10,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:10,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633209602] [2024-06-21 18:14:10,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633209602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:10,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:10,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:10,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428681394] [2024-06-21 18:14:10,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:10,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:10,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:10,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:10,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:10,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 136 transitions, 1408 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:10,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:10,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:10,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:10,487 INFO L124 PetriNetUnfolderBase]: 1176/2026 cut-off events. [2024-06-21 18:14:10,488 INFO L125 PetriNetUnfolderBase]: For 61908/61910 co-relation queries the response was YES. [2024-06-21 18:14:10,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11095 conditions, 2026 events. 1176/2026 cut-off events. For 61908/61910 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11495 event pairs, 349 based on Foata normal form. 10/2035 useless extension candidates. Maximal degree in co-relation 11010. Up to 1752 conditions per place. [2024-06-21 18:14:10,501 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 115 selfloop transitions, 18 changer transitions 12/152 dead transitions. [2024-06-21 18:14:10,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 152 transitions, 1754 flow [2024-06-21 18:14:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 18:14:10,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-21 18:14:10,502 INFO L175 Difference]: Start difference. First operand has 168 places, 136 transitions, 1408 flow. Second operand 8 states and 166 transitions. [2024-06-21 18:14:10,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 152 transitions, 1754 flow [2024-06-21 18:14:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 152 transitions, 1690 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:10,621 INFO L231 Difference]: Finished difference. Result has 160 places, 131 transitions, 1331 flow [2024-06-21 18:14:10,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1331, PETRI_PLACES=160, PETRI_TRANSITIONS=131} [2024-06-21 18:14:10,622 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 120 predicate places. [2024-06-21 18:14:10,622 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 131 transitions, 1331 flow [2024-06-21 18:14:10,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:10,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:10,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:10,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:14:10,622 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:10,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:10,623 INFO L85 PathProgramCache]: Analyzing trace with hash -619994015, now seen corresponding path program 4 times [2024-06-21 18:14:10,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:10,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068545636] [2024-06-21 18:14:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:10,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:10,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068545636] [2024-06-21 18:14:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068545636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:10,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:10,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827004997] [2024-06-21 18:14:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:10,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:10,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:10,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:10,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 131 transitions, 1331 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:10,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:10,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:10,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:11,045 INFO L124 PetriNetUnfolderBase]: 1094/1880 cut-off events. [2024-06-21 18:14:11,046 INFO L125 PetriNetUnfolderBase]: For 54774/54776 co-relation queries the response was YES. [2024-06-21 18:14:11,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10425 conditions, 1880 events. 1094/1880 cut-off events. For 54774/54776 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10442 event pairs, 245 based on Foata normal form. 8/1887 useless extension candidates. Maximal degree in co-relation 10344. Up to 1556 conditions per place. [2024-06-21 18:14:11,059 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 115 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-21 18:14:11,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 152 transitions, 1721 flow [2024-06-21 18:14:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 18:14:11,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 18:14:11,060 INFO L175 Difference]: Start difference. First operand has 160 places, 131 transitions, 1331 flow. Second operand 8 states and 173 transitions. [2024-06-21 18:14:11,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 152 transitions, 1721 flow [2024-06-21 18:14:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 152 transitions, 1640 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:11,136 INFO L231 Difference]: Finished difference. Result has 149 places, 132 transitions, 1348 flow [2024-06-21 18:14:11,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1348, PETRI_PLACES=149, PETRI_TRANSITIONS=132} [2024-06-21 18:14:11,137 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 18:14:11,137 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 132 transitions, 1348 flow [2024-06-21 18:14:11,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:11,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:11,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:11,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:14:11,138 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:11,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:11,138 INFO L85 PathProgramCache]: Analyzing trace with hash -152082639, now seen corresponding path program 5 times [2024-06-21 18:14:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:11,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944278000] [2024-06-21 18:14:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:11,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:11,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:11,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944278000] [2024-06-21 18:14:11,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944278000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:11,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:11,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:11,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370002985] [2024-06-21 18:14:11,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:11,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:11,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:11,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:11,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 132 transitions, 1348 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:11,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:11,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:11,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:11,485 INFO L124 PetriNetUnfolderBase]: 1114/1912 cut-off events. [2024-06-21 18:14:11,485 INFO L125 PetriNetUnfolderBase]: For 44887/44889 co-relation queries the response was YES. [2024-06-21 18:14:11,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 1912 events. 1114/1912 cut-off events. For 44887/44889 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10658 event pairs, 248 based on Foata normal form. 8/1919 useless extension candidates. Maximal degree in co-relation 10045. Up to 1508 conditions per place. [2024-06-21 18:14:11,497 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 116 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-21 18:14:11,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 155 transitions, 1746 flow [2024-06-21 18:14:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 18:14:11,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-21 18:14:11,498 INFO L175 Difference]: Start difference. First operand has 149 places, 132 transitions, 1348 flow. Second operand 8 states and 174 transitions. [2024-06-21 18:14:11,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 155 transitions, 1746 flow [2024-06-21 18:14:11,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 155 transitions, 1638 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:11,560 INFO L231 Difference]: Finished difference. Result has 150 places, 133 transitions, 1332 flow [2024-06-21 18:14:11,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1332, PETRI_PLACES=150, PETRI_TRANSITIONS=133} [2024-06-21 18:14:11,560 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 110 predicate places. [2024-06-21 18:14:11,561 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 133 transitions, 1332 flow [2024-06-21 18:14:11,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:11,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:11,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:11,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:14:11,561 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:11,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:11,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1011934327, now seen corresponding path program 2 times [2024-06-21 18:14:11,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:11,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524988137] [2024-06-21 18:14:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:11,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:11,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:11,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524988137] [2024-06-21 18:14:11,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524988137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:11,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:11,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:11,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630266923] [2024-06-21 18:14:11,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:11,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:11,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:11,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:11,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 133 transitions, 1332 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:11,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:11,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:11,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:11,944 INFO L124 PetriNetUnfolderBase]: 1134/1948 cut-off events. [2024-06-21 18:14:11,945 INFO L125 PetriNetUnfolderBase]: For 46970/46972 co-relation queries the response was YES. [2024-06-21 18:14:11,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10266 conditions, 1948 events. 1134/1948 cut-off events. For 46970/46972 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10940 event pairs, 338 based on Foata normal form. 8/1945 useless extension candidates. Maximal degree in co-relation 10191. Up to 1598 conditions per place. [2024-06-21 18:14:11,957 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 122 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-06-21 18:14:11,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 160 transitions, 1812 flow [2024-06-21 18:14:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 18:14:11,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-21 18:14:11,958 INFO L175 Difference]: Start difference. First operand has 150 places, 133 transitions, 1332 flow. Second operand 8 states and 181 transitions. [2024-06-21 18:14:11,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 160 transitions, 1812 flow [2024-06-21 18:14:12,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 160 transitions, 1732 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:12,036 INFO L231 Difference]: Finished difference. Result has 152 places, 134 transitions, 1340 flow [2024-06-21 18:14:12,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1340, PETRI_PLACES=152, PETRI_TRANSITIONS=134} [2024-06-21 18:14:12,037 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 18:14:12,037 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 134 transitions, 1340 flow [2024-06-21 18:14:12,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:12,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:12,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:12,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:14:12,037 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:12,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:12,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563645, now seen corresponding path program 3 times [2024-06-21 18:14:12,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:12,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443464921] [2024-06-21 18:14:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:12,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:12,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:12,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443464921] [2024-06-21 18:14:12,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443464921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:12,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:12,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:12,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349848640] [2024-06-21 18:14:12,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:12,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:12,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:12,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:12,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 134 transitions, 1340 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:12,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:12,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:12,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:12,402 INFO L124 PetriNetUnfolderBase]: 1116/1919 cut-off events. [2024-06-21 18:14:12,402 INFO L125 PetriNetUnfolderBase]: For 44938/44940 co-relation queries the response was YES. [2024-06-21 18:14:12,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9814 conditions, 1919 events. 1116/1919 cut-off events. For 44938/44940 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10778 event pairs, 333 based on Foata normal form. 10/1923 useless extension candidates. Maximal degree in co-relation 9738. Up to 1632 conditions per place. [2024-06-21 18:14:12,414 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-21 18:14:12,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 152 transitions, 1688 flow [2024-06-21 18:14:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 18:14:12,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-21 18:14:12,415 INFO L175 Difference]: Start difference. First operand has 152 places, 134 transitions, 1340 flow. Second operand 7 states and 157 transitions. [2024-06-21 18:14:12,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 152 transitions, 1688 flow [2024-06-21 18:14:12,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 152 transitions, 1608 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:12,483 INFO L231 Difference]: Finished difference. Result has 154 places, 134 transitions, 1321 flow [2024-06-21 18:14:12,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1321, PETRI_PLACES=154, PETRI_TRANSITIONS=134} [2024-06-21 18:14:12,483 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-06-21 18:14:12,483 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 134 transitions, 1321 flow [2024-06-21 18:14:12,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:12,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:12,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:12,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:14:12,484 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:12,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash 658615415, now seen corresponding path program 4 times [2024-06-21 18:14:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:12,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916557744] [2024-06-21 18:14:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:12,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916557744] [2024-06-21 18:14:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916557744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:12,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:12,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273668370] [2024-06-21 18:14:12,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:12,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:12,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:12,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:12,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 134 transitions, 1321 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:12,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:12,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:12,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:12,860 INFO L124 PetriNetUnfolderBase]: 1136/1950 cut-off events. [2024-06-21 18:14:12,860 INFO L125 PetriNetUnfolderBase]: For 45103/45105 co-relation queries the response was YES. [2024-06-21 18:14:12,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9891 conditions, 1950 events. 1136/1950 cut-off events. For 45103/45105 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10917 event pairs, 238 based on Foata normal form. 8/1951 useless extension candidates. Maximal degree in co-relation 9814. Up to 1545 conditions per place. [2024-06-21 18:14:12,873 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 118 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-21 18:14:12,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 161 transitions, 1809 flow [2024-06-21 18:14:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 18:14:12,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-21 18:14:12,874 INFO L175 Difference]: Start difference. First operand has 154 places, 134 transitions, 1321 flow. Second operand 7 states and 164 transitions. [2024-06-21 18:14:12,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 161 transitions, 1809 flow [2024-06-21 18:14:12,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 161 transitions, 1726 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:12,950 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 1338 flow [2024-06-21 18:14:12,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1338, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2024-06-21 18:14:12,950 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-06-21 18:14:12,950 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 1338 flow [2024-06-21 18:14:12,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:12,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:12,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:12,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:14:12,951 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:12,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:12,951 INFO L85 PathProgramCache]: Analyzing trace with hash 670043255, now seen corresponding path program 5 times [2024-06-21 18:14:12,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:12,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214330372] [2024-06-21 18:14:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:12,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:13,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:13,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214330372] [2024-06-21 18:14:13,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214330372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:13,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:13,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:13,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892640220] [2024-06-21 18:14:13,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:13,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:13,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:13,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 1338 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:13,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:13,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:13,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:13,296 INFO L124 PetriNetUnfolderBase]: 1143/1965 cut-off events. [2024-06-21 18:14:13,297 INFO L125 PetriNetUnfolderBase]: For 46375/46375 co-relation queries the response was YES. [2024-06-21 18:14:13,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10030 conditions, 1965 events. 1143/1965 cut-off events. For 46375/46375 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11054 event pairs, 202 based on Foata normal form. 6/1964 useless extension candidates. Maximal degree in co-relation 9952. Up to 1125 conditions per place. [2024-06-21 18:14:13,311 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 106 selfloop transitions, 44 changer transitions 0/157 dead transitions. [2024-06-21 18:14:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 157 transitions, 1816 flow [2024-06-21 18:14:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 18:14:13,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-21 18:14:13,312 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 1338 flow. Second operand 6 states and 140 transitions. [2024-06-21 18:14:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 157 transitions, 1816 flow [2024-06-21 18:14:13,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 157 transitions, 1728 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:13,394 INFO L231 Difference]: Finished difference. Result has 155 places, 136 transitions, 1366 flow [2024-06-21 18:14:13,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1366, PETRI_PLACES=155, PETRI_TRANSITIONS=136} [2024-06-21 18:14:13,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 115 predicate places. [2024-06-21 18:14:13,395 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 136 transitions, 1366 flow [2024-06-21 18:14:13,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:13,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:13,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:13,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:14:13,396 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:13,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash 645262483, now seen corresponding path program 6 times [2024-06-21 18:14:13,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:13,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649967229] [2024-06-21 18:14:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:13,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649967229] [2024-06-21 18:14:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649967229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:13,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:13,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:13,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264848470] [2024-06-21 18:14:13,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:13,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:13,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 136 transitions, 1366 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:13,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:13,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:13,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:13,773 INFO L124 PetriNetUnfolderBase]: 1125/1942 cut-off events. [2024-06-21 18:14:13,774 INFO L125 PetriNetUnfolderBase]: For 43657/43657 co-relation queries the response was YES. [2024-06-21 18:14:13,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9690 conditions, 1942 events. 1125/1942 cut-off events. For 43657/43657 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10947 event pairs, 346 based on Foata normal form. 8/1948 useless extension candidates. Maximal degree in co-relation 9611. Up to 1651 conditions per place. [2024-06-21 18:14:13,787 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 110 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-21 18:14:13,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 148 transitions, 1690 flow [2024-06-21 18:14:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 18:14:13,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567765567765568 [2024-06-21 18:14:13,788 INFO L175 Difference]: Start difference. First operand has 155 places, 136 transitions, 1366 flow. Second operand 7 states and 152 transitions. [2024-06-21 18:14:13,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 148 transitions, 1690 flow [2024-06-21 18:14:13,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 148 transitions, 1615 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 18:14:13,876 INFO L231 Difference]: Finished difference. Result has 159 places, 136 transitions, 1358 flow [2024-06-21 18:14:13,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1358, PETRI_PLACES=159, PETRI_TRANSITIONS=136} [2024-06-21 18:14:13,877 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 119 predicate places. [2024-06-21 18:14:13,877 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 136 transitions, 1358 flow [2024-06-21 18:14:13,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:13,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:13,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:14:13,877 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:13,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1990366623, now seen corresponding path program 6 times [2024-06-21 18:14:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700289896] [2024-06-21 18:14:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:13,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:13,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700289896] [2024-06-21 18:14:13,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700289896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:13,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:13,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594495893] [2024-06-21 18:14:13,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:13,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:13,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:13,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:13,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:14,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:14,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 136 transitions, 1358 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:14,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:14,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:14,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:14,274 INFO L124 PetriNetUnfolderBase]: 1229/2117 cut-off events. [2024-06-21 18:14:14,274 INFO L125 PetriNetUnfolderBase]: For 67366/67366 co-relation queries the response was YES. [2024-06-21 18:14:14,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10221 conditions, 2117 events. 1229/2117 cut-off events. For 67366/67366 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12229 event pairs, 389 based on Foata normal form. 34/2149 useless extension candidates. Maximal degree in co-relation 10141. Up to 1627 conditions per place. [2024-06-21 18:14:14,287 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 53 changer transitions 3/156 dead transitions. [2024-06-21 18:14:14,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 156 transitions, 1746 flow [2024-06-21 18:14:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 18:14:14,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:14:14,288 INFO L175 Difference]: Start difference. First operand has 159 places, 136 transitions, 1358 flow. Second operand 9 states and 198 transitions. [2024-06-21 18:14:14,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 156 transitions, 1746 flow [2024-06-21 18:14:14,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 156 transitions, 1671 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:14,394 INFO L231 Difference]: Finished difference. Result has 162 places, 136 transitions, 1416 flow [2024-06-21 18:14:14,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1416, PETRI_PLACES=162, PETRI_TRANSITIONS=136} [2024-06-21 18:14:14,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 122 predicate places. [2024-06-21 18:14:14,395 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 136 transitions, 1416 flow [2024-06-21 18:14:14,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:14,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:14,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:14,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:14:14,395 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:14,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1122479731, now seen corresponding path program 2 times [2024-06-21 18:14:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:14,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240917009] [2024-06-21 18:14:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:14,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:14,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:14,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240917009] [2024-06-21 18:14:14,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240917009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:14,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:14,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:14,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811452253] [2024-06-21 18:14:14,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:14,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:14,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:14,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 136 transitions, 1416 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:14,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:14,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:14,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:14,779 INFO L124 PetriNetUnfolderBase]: 1239/2132 cut-off events. [2024-06-21 18:14:14,780 INFO L125 PetriNetUnfolderBase]: For 47244/47244 co-relation queries the response was YES. [2024-06-21 18:14:14,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10480 conditions, 2132 events. 1239/2132 cut-off events. For 47244/47244 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12285 event pairs, 392 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 10399. Up to 1769 conditions per place. [2024-06-21 18:14:14,793 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 111 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2024-06-21 18:14:14,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 153 transitions, 1791 flow [2024-06-21 18:14:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 18:14:14,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 18:14:14,795 INFO L175 Difference]: Start difference. First operand has 162 places, 136 transitions, 1416 flow. Second operand 8 states and 173 transitions. [2024-06-21 18:14:14,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 153 transitions, 1791 flow [2024-06-21 18:14:14,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 153 transitions, 1671 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:14,891 INFO L231 Difference]: Finished difference. Result has 163 places, 137 transitions, 1397 flow [2024-06-21 18:14:14,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1397, PETRI_PLACES=163, PETRI_TRANSITIONS=137} [2024-06-21 18:14:14,892 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-21 18:14:14,892 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 137 transitions, 1397 flow [2024-06-21 18:14:14,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:14,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:14,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:14:14,892 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:14,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1122479917, now seen corresponding path program 7 times [2024-06-21 18:14:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:14,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978759329] [2024-06-21 18:14:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:14,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:14,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:14,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978759329] [2024-06-21 18:14:14,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978759329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:14,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:14,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:14,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532126026] [2024-06-21 18:14:14,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:14,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:14,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:14,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:14,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:15,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:15,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 137 transitions, 1397 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:15,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:15,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:15,345 INFO L124 PetriNetUnfolderBase]: 1335/2313 cut-off events. [2024-06-21 18:14:15,346 INFO L125 PetriNetUnfolderBase]: For 70520/70520 co-relation queries the response was YES. [2024-06-21 18:14:15,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11068 conditions, 2313 events. 1335/2313 cut-off events. For 70520/70520 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13628 event pairs, 395 based on Foata normal form. 30/2341 useless extension candidates. Maximal degree in co-relation 10986. Up to 1595 conditions per place. [2024-06-21 18:14:15,360 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 95 selfloop transitions, 58 changer transitions 6/166 dead transitions. [2024-06-21 18:14:15,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 1865 flow [2024-06-21 18:14:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-21 18:14:15,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 18:14:15,362 INFO L175 Difference]: Start difference. First operand has 163 places, 137 transitions, 1397 flow. Second operand 10 states and 221 transitions. [2024-06-21 18:14:15,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 1865 flow [2024-06-21 18:14:15,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 166 transitions, 1774 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:15,467 INFO L231 Difference]: Finished difference. Result has 168 places, 139 transitions, 1480 flow [2024-06-21 18:14:15,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1480, PETRI_PLACES=168, PETRI_TRANSITIONS=139} [2024-06-21 18:14:15,467 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 128 predicate places. [2024-06-21 18:14:15,467 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 139 transitions, 1480 flow [2024-06-21 18:14:15,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:15,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:15,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:14:15,468 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:15,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1108433011, now seen corresponding path program 3 times [2024-06-21 18:14:15,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:15,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052838036] [2024-06-21 18:14:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:15,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:15,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052838036] [2024-06-21 18:14:15,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052838036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:15,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:15,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:14:15,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302173617] [2024-06-21 18:14:15,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:15,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:14:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:14:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:14:15,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:15,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 139 transitions, 1480 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:15,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:15,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:15,811 INFO L124 PetriNetUnfolderBase]: 1325/2293 cut-off events. [2024-06-21 18:14:15,812 INFO L125 PetriNetUnfolderBase]: For 52129/52129 co-relation queries the response was YES. [2024-06-21 18:14:15,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11198 conditions, 2293 events. 1325/2293 cut-off events. For 52129/52129 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13400 event pairs, 261 based on Foata normal form. 6/2292 useless extension candidates. Maximal degree in co-relation 11114. Up to 1415 conditions per place. [2024-06-21 18:14:15,826 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 105 selfloop transitions, 49 changer transitions 0/161 dead transitions. [2024-06-21 18:14:15,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 1979 flow [2024-06-21 18:14:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:14:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:14:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 18:14:15,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-21 18:14:15,827 INFO L175 Difference]: Start difference. First operand has 168 places, 139 transitions, 1480 flow. Second operand 6 states and 140 transitions. [2024-06-21 18:14:15,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 1979 flow [2024-06-21 18:14:15,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 161 transitions, 1849 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:15,933 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1481 flow [2024-06-21 18:14:15,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1481, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-21 18:14:15,934 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-21 18:14:15,934 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1481 flow [2024-06-21 18:14:15,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:15,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:15,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:15,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:14:15,934 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:15,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:15,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1268630121, now seen corresponding path program 8 times [2024-06-21 18:14:15,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:15,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113090845] [2024-06-21 18:14:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:16,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113090845] [2024-06-21 18:14:16,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113090845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:16,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:16,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:16,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436138140] [2024-06-21 18:14:16,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:16,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:16,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:16,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:16,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:16,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1481 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:16,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:16,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:16,423 INFO L124 PetriNetUnfolderBase]: 1548/2682 cut-off events. [2024-06-21 18:14:16,423 INFO L125 PetriNetUnfolderBase]: For 100124/100124 co-relation queries the response was YES. [2024-06-21 18:14:16,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13732 conditions, 2682 events. 1548/2682 cut-off events. For 100124/100124 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16207 event pairs, 433 based on Foata normal form. 30/2710 useless extension candidates. Maximal degree in co-relation 13648. Up to 1383 conditions per place. [2024-06-21 18:14:16,439 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 65 changer transitions 8/173 dead transitions. [2024-06-21 18:14:16,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 173 transitions, 2074 flow [2024-06-21 18:14:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 18:14:16,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-21 18:14:16,440 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1481 flow. Second operand 9 states and 208 transitions. [2024-06-21 18:14:16,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 173 transitions, 2074 flow [2024-06-21 18:14:16,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 173 transitions, 1872 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:16,581 INFO L231 Difference]: Finished difference. Result has 170 places, 141 transitions, 1442 flow [2024-06-21 18:14:16,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1442, PETRI_PLACES=170, PETRI_TRANSITIONS=141} [2024-06-21 18:14:16,582 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-21 18:14:16,582 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 141 transitions, 1442 flow [2024-06-21 18:14:16,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:16,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:16,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:14:16,583 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:16,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:16,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1108670161, now seen corresponding path program 4 times [2024-06-21 18:14:16,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:16,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910658123] [2024-06-21 18:14:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:16,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:16,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:16,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910658123] [2024-06-21 18:14:16,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910658123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:16,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:16,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368537153] [2024-06-21 18:14:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:16,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:16,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:16,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:16,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 141 transitions, 1442 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:16,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:16,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:16,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:17,001 INFO L124 PetriNetUnfolderBase]: 1262/2188 cut-off events. [2024-06-21 18:14:17,002 INFO L125 PetriNetUnfolderBase]: For 72551/72551 co-relation queries the response was YES. [2024-06-21 18:14:17,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11270 conditions, 2188 events. 1262/2188 cut-off events. For 72551/72551 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12638 event pairs, 341 based on Foata normal form. 6/2192 useless extension candidates. Maximal degree in co-relation 11186. Up to 1768 conditions per place. [2024-06-21 18:14:17,017 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 103 selfloop transitions, 47 changer transitions 0/157 dead transitions. [2024-06-21 18:14:17,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 157 transitions, 1800 flow [2024-06-21 18:14:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 18:14:17,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-21 18:14:17,018 INFO L175 Difference]: Start difference. First operand has 170 places, 141 transitions, 1442 flow. Second operand 7 states and 157 transitions. [2024-06-21 18:14:17,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 157 transitions, 1800 flow [2024-06-21 18:14:17,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 157 transitions, 1622 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:17,169 INFO L231 Difference]: Finished difference. Result has 170 places, 141 transitions, 1363 flow [2024-06-21 18:14:17,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1363, PETRI_PLACES=170, PETRI_TRANSITIONS=141} [2024-06-21 18:14:17,169 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-21 18:14:17,170 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 141 transitions, 1363 flow [2024-06-21 18:14:17,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:17,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:17,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:14:17,170 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:17,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash -389907039, now seen corresponding path program 9 times [2024-06-21 18:14:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490898816] [2024-06-21 18:14:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490898816] [2024-06-21 18:14:17,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490898816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:17,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050252820] [2024-06-21 18:14:17,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:17,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:17,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:17,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:17,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 141 transitions, 1363 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:17,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:17,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:17,545 INFO L124 PetriNetUnfolderBase]: 1155/2009 cut-off events. [2024-06-21 18:14:17,546 INFO L125 PetriNetUnfolderBase]: For 45464/45464 co-relation queries the response was YES. [2024-06-21 18:14:17,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9334 conditions, 2009 events. 1155/2009 cut-off events. For 45464/45464 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11420 event pairs, 366 based on Foata normal form. 6/2013 useless extension candidates. Maximal degree in co-relation 9250. Up to 1699 conditions per place. [2024-06-21 18:14:17,559 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 115 selfloop transitions, 34 changer transitions 0/156 dead transitions. [2024-06-21 18:14:17,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 156 transitions, 1729 flow [2024-06-21 18:14:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 18:14:17,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-06-21 18:14:17,561 INFO L175 Difference]: Start difference. First operand has 170 places, 141 transitions, 1363 flow. Second operand 8 states and 170 transitions. [2024-06-21 18:14:17,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 156 transitions, 1729 flow [2024-06-21 18:14:17,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 156 transitions, 1606 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:17,654 INFO L231 Difference]: Finished difference. Result has 171 places, 142 transitions, 1344 flow [2024-06-21 18:14:17,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1344, PETRI_PLACES=171, PETRI_TRANSITIONS=142} [2024-06-21 18:14:17,654 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-21 18:14:17,654 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 142 transitions, 1344 flow [2024-06-21 18:14:17,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:17,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:17,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:14:17,655 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:17,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:17,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1046672147, now seen corresponding path program 10 times [2024-06-21 18:14:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:17,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695202257] [2024-06-21 18:14:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:17,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:17,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:17,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695202257] [2024-06-21 18:14:17,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695202257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:17,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:17,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:17,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356356072] [2024-06-21 18:14:17,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:17,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:17,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:17,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:17,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:17,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 142 transitions, 1344 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:17,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:17,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:17,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:17,996 INFO L124 PetriNetUnfolderBase]: 1208/2094 cut-off events. [2024-06-21 18:14:17,996 INFO L125 PetriNetUnfolderBase]: For 55724/55724 co-relation queries the response was YES. [2024-06-21 18:14:18,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10115 conditions, 2094 events. 1208/2094 cut-off events. For 55724/55724 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12021 event pairs, 378 based on Foata normal form. 6/2098 useless extension candidates. Maximal degree in co-relation 10031. Up to 1539 conditions per place. [2024-06-21 18:14:18,010 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 98 selfloop transitions, 59 changer transitions 0/164 dead transitions. [2024-06-21 18:14:18,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 164 transitions, 1886 flow [2024-06-21 18:14:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 18:14:18,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-21 18:14:18,011 INFO L175 Difference]: Start difference. First operand has 171 places, 142 transitions, 1344 flow. Second operand 8 states and 179 transitions. [2024-06-21 18:14:18,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 164 transitions, 1886 flow [2024-06-21 18:14:18,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 164 transitions, 1766 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:18,102 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 1412 flow [2024-06-21 18:14:18,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2024-06-21 18:14:18,103 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-21 18:14:18,103 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 1412 flow [2024-06-21 18:14:18,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:18,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:14:18,103 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:18,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash -594972029, now seen corresponding path program 11 times [2024-06-21 18:14:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911171343] [2024-06-21 18:14:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:18,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:18,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911171343] [2024-06-21 18:14:18,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911171343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:18,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:18,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:18,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034389668] [2024-06-21 18:14:18,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:18,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:18,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:18,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:18,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:18,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:18,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 1412 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:18,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:18,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:18,508 INFO L124 PetriNetUnfolderBase]: 1236/2140 cut-off events. [2024-06-21 18:14:18,508 INFO L125 PetriNetUnfolderBase]: For 60577/60577 co-relation queries the response was YES. [2024-06-21 18:14:18,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10460 conditions, 2140 events. 1236/2140 cut-off events. For 60577/60577 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12322 event pairs, 428 based on Foata normal form. 8/2146 useless extension candidates. Maximal degree in co-relation 10376. Up to 1805 conditions per place. [2024-06-21 18:14:18,525 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 52 changer transitions 0/158 dead transitions. [2024-06-21 18:14:18,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 158 transitions, 1792 flow [2024-06-21 18:14:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 18:14:18,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 18:14:18,526 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 1412 flow. Second operand 8 states and 173 transitions. [2024-06-21 18:14:18,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 158 transitions, 1792 flow [2024-06-21 18:14:18,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 1650 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:18,669 INFO L231 Difference]: Finished difference. Result has 173 places, 145 transitions, 1415 flow [2024-06-21 18:14:18,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1415, PETRI_PLACES=173, PETRI_TRANSITIONS=145} [2024-06-21 18:14:18,670 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 18:14:18,670 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 1415 flow [2024-06-21 18:14:18,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:18,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:18,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:14:18,671 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:18,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1642277289, now seen corresponding path program 12 times [2024-06-21 18:14:18,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:18,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041667473] [2024-06-21 18:14:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:18,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:18,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041667473] [2024-06-21 18:14:18,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041667473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:18,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:18,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:18,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716209894] [2024-06-21 18:14:18,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:18,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:18,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:18,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:18,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 145 transitions, 1415 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:18,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:18,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:18,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,029 INFO L124 PetriNetUnfolderBase]: 1218/2114 cut-off events. [2024-06-21 18:14:19,030 INFO L125 PetriNetUnfolderBase]: For 50202/50202 co-relation queries the response was YES. [2024-06-21 18:14:19,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9682 conditions, 2114 events. 1218/2114 cut-off events. For 50202/50202 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12193 event pairs, 404 based on Foata normal form. 8/2120 useless extension candidates. Maximal degree in co-relation 9599. Up to 1671 conditions per place. [2024-06-21 18:14:19,045 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 101 selfloop transitions, 54 changer transitions 0/162 dead transitions. [2024-06-21 18:14:19,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 162 transitions, 1793 flow [2024-06-21 18:14:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 18:14:19,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 18:14:19,047 INFO L175 Difference]: Start difference. First operand has 173 places, 145 transitions, 1415 flow. Second operand 8 states and 176 transitions. [2024-06-21 18:14:19,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 162 transitions, 1793 flow [2024-06-21 18:14:19,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 162 transitions, 1648 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:19,182 INFO L231 Difference]: Finished difference. Result has 175 places, 145 transitions, 1382 flow [2024-06-21 18:14:19,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=175, PETRI_TRANSITIONS=145} [2024-06-21 18:14:19,183 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-21 18:14:19,183 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 145 transitions, 1382 flow [2024-06-21 18:14:19,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:14:19,184 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1197374701, now seen corresponding path program 13 times [2024-06-21 18:14:19,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421520737] [2024-06-21 18:14:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421520737] [2024-06-21 18:14:19,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421520737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:19,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661943547] [2024-06-21 18:14:19,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:19,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:19,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:19,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 145 transitions, 1382 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:19,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:19,549 INFO L124 PetriNetUnfolderBase]: 1365/2347 cut-off events. [2024-06-21 18:14:19,549 INFO L125 PetriNetUnfolderBase]: For 78210/78210 co-relation queries the response was YES. [2024-06-21 18:14:19,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11593 conditions, 2347 events. 1365/2347 cut-off events. For 78210/78210 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13731 event pairs, 415 based on Foata normal form. 6/2351 useless extension candidates. Maximal degree in co-relation 11509. Up to 1230 conditions per place. [2024-06-21 18:14:19,565 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 90 selfloop transitions, 73 changer transitions 0/170 dead transitions. [2024-06-21 18:14:19,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 170 transitions, 2016 flow [2024-06-21 18:14:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 18:14:19,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-21 18:14:19,566 INFO L175 Difference]: Start difference. First operand has 175 places, 145 transitions, 1382 flow. Second operand 8 states and 181 transitions. [2024-06-21 18:14:19,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 170 transitions, 2016 flow [2024-06-21 18:14:19,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 170 transitions, 1888 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:19,752 INFO L231 Difference]: Finished difference. Result has 176 places, 146 transitions, 1434 flow [2024-06-21 18:14:19,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1434, PETRI_PLACES=176, PETRI_TRANSITIONS=146} [2024-06-21 18:14:19,752 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 18:14:19,752 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 146 transitions, 1434 flow [2024-06-21 18:14:19,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:19,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:19,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:14:19,753 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:19,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1197254731, now seen corresponding path program 14 times [2024-06-21 18:14:19,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:19,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461887422] [2024-06-21 18:14:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:19,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:19,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461887422] [2024-06-21 18:14:19,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461887422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:19,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:19,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066618108] [2024-06-21 18:14:19,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:19,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:19,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:19,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:19,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 146 transitions, 1434 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:19,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:19,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:19,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:20,185 INFO L124 PetriNetUnfolderBase]: 1393/2405 cut-off events. [2024-06-21 18:14:20,185 INFO L125 PetriNetUnfolderBase]: For 82620/82620 co-relation queries the response was YES. [2024-06-21 18:14:20,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12100 conditions, 2405 events. 1393/2405 cut-off events. For 82620/82620 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14179 event pairs, 376 based on Foata normal form. 6/2409 useless extension candidates. Maximal degree in co-relation 12015. Up to 1977 conditions per place. [2024-06-21 18:14:20,202 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 110 selfloop transitions, 50 changer transitions 0/167 dead transitions. [2024-06-21 18:14:20,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 167 transitions, 1866 flow [2024-06-21 18:14:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 18:14:20,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-21 18:14:20,203 INFO L175 Difference]: Start difference. First operand has 176 places, 146 transitions, 1434 flow. Second operand 8 states and 175 transitions. [2024-06-21 18:14:20,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 167 transitions, 1866 flow [2024-06-21 18:14:20,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 167 transitions, 1657 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:20,419 INFO L231 Difference]: Finished difference. Result has 178 places, 149 transitions, 1381 flow [2024-06-21 18:14:20,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=178, PETRI_TRANSITIONS=149} [2024-06-21 18:14:20,419 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-21 18:14:20,419 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 149 transitions, 1381 flow [2024-06-21 18:14:20,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:20,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:20,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:20,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:14:20,420 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:20,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1189367251, now seen corresponding path program 15 times [2024-06-21 18:14:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:20,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481307502] [2024-06-21 18:14:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481307502] [2024-06-21 18:14:20,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481307502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:20,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:20,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:20,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422598174] [2024-06-21 18:14:20,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:20,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:20,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:20,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:20,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 149 transitions, 1381 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:20,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:20,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:20,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:20,841 INFO L124 PetriNetUnfolderBase]: 1253/2173 cut-off events. [2024-06-21 18:14:20,841 INFO L125 PetriNetUnfolderBase]: For 45293/45293 co-relation queries the response was YES. [2024-06-21 18:14:20,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9288 conditions, 2173 events. 1253/2173 cut-off events. For 45293/45293 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12660 event pairs, 285 based on Foata normal form. 6/2177 useless extension candidates. Maximal degree in co-relation 9203. Up to 1681 conditions per place. [2024-06-21 18:14:20,861 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 111 selfloop transitions, 53 changer transitions 0/171 dead transitions. [2024-06-21 18:14:20,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 171 transitions, 1787 flow [2024-06-21 18:14:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 18:14:20,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527065527065527 [2024-06-21 18:14:20,862 INFO L175 Difference]: Start difference. First operand has 178 places, 149 transitions, 1381 flow. Second operand 9 states and 194 transitions. [2024-06-21 18:14:20,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 171 transitions, 1787 flow [2024-06-21 18:14:21,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 171 transitions, 1641 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 18:14:21,008 INFO L231 Difference]: Finished difference. Result has 182 places, 149 transitions, 1345 flow [2024-06-21 18:14:21,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1345, PETRI_PLACES=182, PETRI_TRANSITIONS=149} [2024-06-21 18:14:21,008 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 142 predicate places. [2024-06-21 18:14:21,008 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 149 transitions, 1345 flow [2024-06-21 18:14:21,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:21,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:21,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:21,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:14:21,009 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:21,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1331484617, now seen corresponding path program 1 times [2024-06-21 18:14:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:21,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907687972] [2024-06-21 18:14:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:21,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907687972] [2024-06-21 18:14:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907687972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:21,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:21,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:21,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289971] [2024-06-21 18:14:21,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:21,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:21,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:21,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:21,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 149 transitions, 1345 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:21,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:21,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:21,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:21,464 INFO L124 PetriNetUnfolderBase]: 1455/2553 cut-off events. [2024-06-21 18:14:21,464 INFO L125 PetriNetUnfolderBase]: For 90050/90051 co-relation queries the response was YES. [2024-06-21 18:14:21,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11433 conditions, 2553 events. 1455/2553 cut-off events. For 90050/90051 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15574 event pairs, 247 based on Foata normal form. 19/2571 useless extension candidates. Maximal degree in co-relation 11347. Up to 1667 conditions per place. [2024-06-21 18:14:21,481 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 27 changer transitions 11/184 dead transitions. [2024-06-21 18:14:21,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 184 transitions, 1944 flow [2024-06-21 18:14:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 18:14:21,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 18:14:21,482 INFO L175 Difference]: Start difference. First operand has 182 places, 149 transitions, 1345 flow. Second operand 7 states and 169 transitions. [2024-06-21 18:14:21,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 184 transitions, 1944 flow [2024-06-21 18:14:21,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 184 transitions, 1812 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:21,717 INFO L231 Difference]: Finished difference. Result has 181 places, 149 transitions, 1290 flow [2024-06-21 18:14:21,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1290, PETRI_PLACES=181, PETRI_TRANSITIONS=149} [2024-06-21 18:14:21,717 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-21 18:14:21,717 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 149 transitions, 1290 flow [2024-06-21 18:14:21,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:21,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:21,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:21,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:14:21,718 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:21,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1331186087, now seen corresponding path program 2 times [2024-06-21 18:14:21,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:21,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380383385] [2024-06-21 18:14:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:21,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:21,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:21,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380383385] [2024-06-21 18:14:21,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380383385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:21,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:21,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598841862] [2024-06-21 18:14:21,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:21,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:21,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 149 transitions, 1290 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:21,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:21,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:21,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:22,157 INFO L124 PetriNetUnfolderBase]: 1371/2401 cut-off events. [2024-06-21 18:14:22,157 INFO L125 PetriNetUnfolderBase]: For 85796/85797 co-relation queries the response was YES. [2024-06-21 18:14:22,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10647 conditions, 2401 events. 1371/2401 cut-off events. For 85796/85797 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14437 event pairs, 306 based on Foata normal form. 19/2419 useless extension candidates. Maximal degree in co-relation 10560. Up to 1667 conditions per place. [2024-06-21 18:14:22,175 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 138 selfloop transitions, 22 changer transitions 10/177 dead transitions. [2024-06-21 18:14:22,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 177 transitions, 1834 flow [2024-06-21 18:14:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 18:14:22,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970695970695971 [2024-06-21 18:14:22,176 INFO L175 Difference]: Start difference. First operand has 181 places, 149 transitions, 1290 flow. Second operand 7 states and 163 transitions. [2024-06-21 18:14:22,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 177 transitions, 1834 flow [2024-06-21 18:14:22,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 177 transitions, 1788 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:14:22,402 INFO L231 Difference]: Finished difference. Result has 180 places, 145 transitions, 1255 flow [2024-06-21 18:14:22,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1255, PETRI_PLACES=180, PETRI_TRANSITIONS=145} [2024-06-21 18:14:22,402 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 18:14:22,402 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 145 transitions, 1255 flow [2024-06-21 18:14:22,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:22,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:22,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:22,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:14:22,403 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:22,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:22,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1957848983, now seen corresponding path program 1 times [2024-06-21 18:14:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:22,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255108128] [2024-06-21 18:14:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:22,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:22,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:22,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255108128] [2024-06-21 18:14:22,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255108128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:22,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:22,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:22,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495102637] [2024-06-21 18:14:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:22,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:22,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:22,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:22,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:22,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:22,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 145 transitions, 1255 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:22,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:22,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:22,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:22,864 INFO L124 PetriNetUnfolderBase]: 1335/2333 cut-off events. [2024-06-21 18:14:22,865 INFO L125 PetriNetUnfolderBase]: For 82529/82530 co-relation queries the response was YES. [2024-06-21 18:14:22,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10321 conditions, 2333 events. 1335/2333 cut-off events. For 82529/82530 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13938 event pairs, 237 based on Foata normal form. 19/2351 useless extension candidates. Maximal degree in co-relation 10235. Up to 1667 conditions per place. [2024-06-21 18:14:22,883 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 136 selfloop transitions, 23 changer transitions 8/174 dead transitions. [2024-06-21 18:14:22,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 174 transitions, 1801 flow [2024-06-21 18:14:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 18:14:22,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-21 18:14:22,884 INFO L175 Difference]: Start difference. First operand has 180 places, 145 transitions, 1255 flow. Second operand 7 states and 164 transitions. [2024-06-21 18:14:22,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 174 transitions, 1801 flow [2024-06-21 18:14:23,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 174 transitions, 1747 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:23,089 INFO L231 Difference]: Finished difference. Result has 176 places, 143 transitions, 1235 flow [2024-06-21 18:14:23,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1235, PETRI_PLACES=176, PETRI_TRANSITIONS=143} [2024-06-21 18:14:23,089 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 18:14:23,090 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 143 transitions, 1235 flow [2024-06-21 18:14:23,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:23,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:23,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:23,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:14:23,090 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:23,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1250008957, now seen corresponding path program 2 times [2024-06-21 18:14:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:23,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667798132] [2024-06-21 18:14:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:23,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667798132] [2024-06-21 18:14:23,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667798132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:23,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:23,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:23,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902509725] [2024-06-21 18:14:23,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:23,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:23,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:23,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:23,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:23,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:23,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 143 transitions, 1235 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:23,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:23,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:23,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:23,518 INFO L124 PetriNetUnfolderBase]: 1230/2146 cut-off events. [2024-06-21 18:14:23,519 INFO L125 PetriNetUnfolderBase]: For 59618/59619 co-relation queries the response was YES. [2024-06-21 18:14:23,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 2146 events. 1230/2146 cut-off events. For 59618/59619 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12611 event pairs, 219 based on Foata normal form. 19/2164 useless extension candidates. Maximal degree in co-relation 8748. Up to 1667 conditions per place. [2024-06-21 18:14:23,531 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 133 selfloop transitions, 20 changer transitions 10/170 dead transitions. [2024-06-21 18:14:23,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 170 transitions, 1661 flow [2024-06-21 18:14:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:14:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:14:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 18:14:23,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-21 18:14:23,532 INFO L175 Difference]: Start difference. First operand has 176 places, 143 transitions, 1235 flow. Second operand 7 states and 162 transitions. [2024-06-21 18:14:23,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 170 transitions, 1661 flow [2024-06-21 18:14:23,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 170 transitions, 1611 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:23,695 INFO L231 Difference]: Finished difference. Result has 175 places, 139 transitions, 1183 flow [2024-06-21 18:14:23,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1183, PETRI_PLACES=175, PETRI_TRANSITIONS=139} [2024-06-21 18:14:23,695 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-21 18:14:23,696 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 139 transitions, 1183 flow [2024-06-21 18:14:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:23,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:23,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:23,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:14:23,696 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:23,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash -415874185, now seen corresponding path program 3 times [2024-06-21 18:14:23,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:23,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335032247] [2024-06-21 18:14:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:23,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:23,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:23,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335032247] [2024-06-21 18:14:23,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335032247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:23,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:23,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88786850] [2024-06-21 18:14:23,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:23,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:23,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:23,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 139 transitions, 1183 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:23,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:23,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:23,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:24,150 INFO L124 PetriNetUnfolderBase]: 1283/2243 cut-off events. [2024-06-21 18:14:24,150 INFO L125 PetriNetUnfolderBase]: For 82273/82274 co-relation queries the response was YES. [2024-06-21 18:14:24,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9950 conditions, 2243 events. 1283/2243 cut-off events. For 82273/82274 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13275 event pairs, 239 based on Foata normal form. 19/2261 useless extension candidates. Maximal degree in co-relation 9866. Up to 1579 conditions per place. [2024-06-21 18:14:24,165 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 135 selfloop transitions, 22 changer transitions 8/172 dead transitions. [2024-06-21 18:14:24,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 172 transitions, 1741 flow [2024-06-21 18:14:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 18:14:24,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-21 18:14:24,167 INFO L175 Difference]: Start difference. First operand has 175 places, 139 transitions, 1183 flow. Second operand 8 states and 183 transitions. [2024-06-21 18:14:24,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 172 transitions, 1741 flow [2024-06-21 18:14:24,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 172 transitions, 1669 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:24,384 INFO L231 Difference]: Finished difference. Result has 174 places, 137 transitions, 1147 flow [2024-06-21 18:14:24,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1147, PETRI_PLACES=174, PETRI_TRANSITIONS=137} [2024-06-21 18:14:24,384 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 18:14:24,384 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 137 transitions, 1147 flow [2024-06-21 18:14:24,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:24,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:24,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:24,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:14:24,385 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:24,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:24,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2039938443, now seen corresponding path program 4 times [2024-06-21 18:14:24,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:24,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342513953] [2024-06-21 18:14:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:24,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:24,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:24,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342513953] [2024-06-21 18:14:24,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342513953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:24,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:24,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:24,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860543012] [2024-06-21 18:14:24,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:24,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:24,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:24,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:24,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:24,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:24,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 137 transitions, 1147 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:24,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:24,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:24,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:24,806 INFO L124 PetriNetUnfolderBase]: 1178/2056 cut-off events. [2024-06-21 18:14:24,806 INFO L125 PetriNetUnfolderBase]: For 58963/58964 co-relation queries the response was YES. [2024-06-21 18:14:24,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8492 conditions, 2056 events. 1178/2056 cut-off events. For 58963/58964 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11922 event pairs, 227 based on Foata normal form. 19/2074 useless extension candidates. Maximal degree in co-relation 8408. Up to 1579 conditions per place. [2024-06-21 18:14:24,819 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 128 selfloop transitions, 22 changer transitions 8/165 dead transitions. [2024-06-21 18:14:24,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 165 transitions, 1565 flow [2024-06-21 18:14:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 18:14:24,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-21 18:14:24,820 INFO L175 Difference]: Start difference. First operand has 174 places, 137 transitions, 1147 flow. Second operand 8 states and 178 transitions. [2024-06-21 18:14:24,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 165 transitions, 1565 flow [2024-06-21 18:14:24,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 165 transitions, 1507 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:24,951 INFO L231 Difference]: Finished difference. Result has 173 places, 135 transitions, 1119 flow [2024-06-21 18:14:24,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1119, PETRI_PLACES=173, PETRI_TRANSITIONS=135} [2024-06-21 18:14:24,952 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-21 18:14:24,952 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 135 transitions, 1119 flow [2024-06-21 18:14:24,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:24,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:24,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:24,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:14:24,953 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:24,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2043663093, now seen corresponding path program 5 times [2024-06-21 18:14:24,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:24,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929064948] [2024-06-21 18:14:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:24,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:25,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:25,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929064948] [2024-06-21 18:14:25,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929064948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:25,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:25,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:25,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582251825] [2024-06-21 18:14:25,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:25,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:25,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:25,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:25,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 135 transitions, 1119 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:25,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:25,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:25,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:25,329 INFO L124 PetriNetUnfolderBase]: 1154/2004 cut-off events. [2024-06-21 18:14:25,329 INFO L125 PetriNetUnfolderBase]: For 57109/57110 co-relation queries the response was YES. [2024-06-21 18:14:25,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8246 conditions, 2004 events. 1154/2004 cut-off events. For 57109/57110 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11514 event pairs, 246 based on Foata normal form. 19/2022 useless extension candidates. Maximal degree in co-relation 8164. Up to 1511 conditions per place. [2024-06-21 18:14:25,341 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 121 selfloop transitions, 17 changer transitions 20/165 dead transitions. [2024-06-21 18:14:25,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 165 transitions, 1549 flow [2024-06-21 18:14:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 18:14:25,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-21 18:14:25,342 INFO L175 Difference]: Start difference. First operand has 173 places, 135 transitions, 1119 flow. Second operand 8 states and 178 transitions. [2024-06-21 18:14:25,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 165 transitions, 1549 flow [2024-06-21 18:14:25,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 165 transitions, 1487 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:25,476 INFO L231 Difference]: Finished difference. Result has 169 places, 129 transitions, 1040 flow [2024-06-21 18:14:25,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1040, PETRI_PLACES=169, PETRI_TRANSITIONS=129} [2024-06-21 18:14:25,476 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-21 18:14:25,476 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 129 transitions, 1040 flow [2024-06-21 18:14:25,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:25,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:25,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:25,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:14:25,477 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:25,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1103806357, now seen corresponding path program 3 times [2024-06-21 18:14:25,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:25,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205781118] [2024-06-21 18:14:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:25,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:25,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205781118] [2024-06-21 18:14:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205781118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:25,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:25,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:25,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645073529] [2024-06-21 18:14:25,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:25,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:25,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:25,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:25,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 129 transitions, 1040 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:25,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:25,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:25,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:25,979 INFO L124 PetriNetUnfolderBase]: 1233/2119 cut-off events. [2024-06-21 18:14:25,979 INFO L125 PetriNetUnfolderBase]: For 95699/95700 co-relation queries the response was YES. [2024-06-21 18:14:25,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9879 conditions, 2119 events. 1233/2119 cut-off events. For 95699/95700 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12294 event pairs, 407 based on Foata normal form. 25/2142 useless extension candidates. Maximal degree in co-relation 9798. Up to 1451 conditions per place. [2024-06-21 18:14:25,993 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 108 selfloop transitions, 39 changer transitions 13/167 dead transitions. [2024-06-21 18:14:25,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 167 transitions, 1592 flow [2024-06-21 18:14:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:14:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:14:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-21 18:14:25,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2024-06-21 18:14:25,994 INFO L175 Difference]: Start difference. First operand has 169 places, 129 transitions, 1040 flow. Second operand 12 states and 258 transitions. [2024-06-21 18:14:25,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 167 transitions, 1592 flow [2024-06-21 18:14:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 167 transitions, 1481 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 18:14:26,237 INFO L231 Difference]: Finished difference. Result has 163 places, 126 transitions, 991 flow [2024-06-21 18:14:26,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=991, PETRI_PLACES=163, PETRI_TRANSITIONS=126} [2024-06-21 18:14:26,240 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-21 18:14:26,241 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 126 transitions, 991 flow [2024-06-21 18:14:26,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:26,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:26,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:26,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:14:26,241 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:26,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1313306841, now seen corresponding path program 4 times [2024-06-21 18:14:26,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:26,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140707881] [2024-06-21 18:14:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:26,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140707881] [2024-06-21 18:14:26,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140707881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:26,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:26,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:26,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495585130] [2024-06-21 18:14:26,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:26,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:26,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:26,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:26,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:26,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:26,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 126 transitions, 991 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:26,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:26,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:26,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:26,673 INFO L124 PetriNetUnfolderBase]: 1173/2007 cut-off events. [2024-06-21 18:14:26,673 INFO L125 PetriNetUnfolderBase]: For 86941/86942 co-relation queries the response was YES. [2024-06-21 18:14:26,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9260 conditions, 2007 events. 1173/2007 cut-off events. For 86941/86942 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11495 event pairs, 433 based on Foata normal form. 27/2032 useless extension candidates. Maximal degree in co-relation 9185. Up to 1662 conditions per place. [2024-06-21 18:14:26,688 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 96 selfloop transitions, 34 changer transitions 17/154 dead transitions. [2024-06-21 18:14:26,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 154 transitions, 1373 flow [2024-06-21 18:14:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:14:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:14:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-21 18:14:26,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-06-21 18:14:26,689 INFO L175 Difference]: Start difference. First operand has 163 places, 126 transitions, 991 flow. Second operand 12 states and 248 transitions. [2024-06-21 18:14:26,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 154 transitions, 1373 flow [2024-06-21 18:14:26,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 154 transitions, 1297 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:26,818 INFO L231 Difference]: Finished difference. Result has 162 places, 121 transitions, 951 flow [2024-06-21 18:14:26,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=951, PETRI_PLACES=162, PETRI_TRANSITIONS=121} [2024-06-21 18:14:26,819 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 122 predicate places. [2024-06-21 18:14:26,819 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 121 transitions, 951 flow [2024-06-21 18:14:26,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:26,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:26,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:26,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:14:26,819 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:26,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1306217451, now seen corresponding path program 5 times [2024-06-21 18:14:26,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:26,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175508048] [2024-06-21 18:14:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:26,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:26,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175508048] [2024-06-21 18:14:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175508048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:26,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:26,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490349665] [2024-06-21 18:14:26,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:26,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:26,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:26,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 121 transitions, 951 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:26,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:26,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:26,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:27,319 INFO L124 PetriNetUnfolderBase]: 1248/2148 cut-off events. [2024-06-21 18:14:27,320 INFO L125 PetriNetUnfolderBase]: For 98984/98985 co-relation queries the response was YES. [2024-06-21 18:14:27,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10648 conditions, 2148 events. 1248/2148 cut-off events. For 98984/98985 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12521 event pairs, 396 based on Foata normal form. 19/2165 useless extension candidates. Maximal degree in co-relation 10574. Up to 1268 conditions per place. [2024-06-21 18:14:27,331 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 111 selfloop transitions, 36 changer transitions 11/165 dead transitions. [2024-06-21 18:14:27,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 1609 flow [2024-06-21 18:14:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:14:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:14:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-21 18:14:27,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-06-21 18:14:27,332 INFO L175 Difference]: Start difference. First operand has 162 places, 121 transitions, 951 flow. Second operand 12 states and 262 transitions. [2024-06-21 18:14:27,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 1609 flow [2024-06-21 18:14:27,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 165 transitions, 1523 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:27,466 INFO L231 Difference]: Finished difference. Result has 158 places, 119 transitions, 938 flow [2024-06-21 18:14:27,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=938, PETRI_PLACES=158, PETRI_TRANSITIONS=119} [2024-06-21 18:14:27,466 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 118 predicate places. [2024-06-21 18:14:27,466 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 119 transitions, 938 flow [2024-06-21 18:14:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:27,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:27,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:27,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:14:27,467 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:27,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1305194137, now seen corresponding path program 6 times [2024-06-21 18:14:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:27,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412296491] [2024-06-21 18:14:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:27,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:27,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412296491] [2024-06-21 18:14:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412296491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:27,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:27,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956188511] [2024-06-21 18:14:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:27,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:27,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:27,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 119 transitions, 938 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:27,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:27,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:27,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:27,933 INFO L124 PetriNetUnfolderBase]: 1197/2055 cut-off events. [2024-06-21 18:14:27,933 INFO L125 PetriNetUnfolderBase]: For 90868/90869 co-relation queries the response was YES. [2024-06-21 18:14:27,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10240 conditions, 2055 events. 1197/2055 cut-off events. For 90868/90869 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11874 event pairs, 464 based on Foata normal form. 19/2072 useless extension candidates. Maximal degree in co-relation 10168. Up to 1268 conditions per place. [2024-06-21 18:14:27,945 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 100 selfloop transitions, 33 changer transitions 16/156 dead transitions. [2024-06-21 18:14:27,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 156 transitions, 1452 flow [2024-06-21 18:14:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:14:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:14:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-21 18:14:27,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-06-21 18:14:27,946 INFO L175 Difference]: Start difference. First operand has 158 places, 119 transitions, 938 flow. Second operand 12 states and 255 transitions. [2024-06-21 18:14:27,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 156 transitions, 1452 flow [2024-06-21 18:14:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 156 transitions, 1374 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:28,051 INFO L231 Difference]: Finished difference. Result has 157 places, 116 transitions, 910 flow [2024-06-21 18:14:28,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=910, PETRI_PLACES=157, PETRI_TRANSITIONS=116} [2024-06-21 18:14:28,051 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-06-21 18:14:28,051 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 116 transitions, 910 flow [2024-06-21 18:14:28,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:28,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:28,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:28,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 18:14:28,052 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:28,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:28,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550647, now seen corresponding path program 7 times [2024-06-21 18:14:28,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:28,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707998933] [2024-06-21 18:14:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:28,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707998933] [2024-06-21 18:14:28,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707998933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:28,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:28,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:28,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565823986] [2024-06-21 18:14:28,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:28,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:28,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:28,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:28,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 116 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:28,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:28,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:28,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:28,459 INFO L124 PetriNetUnfolderBase]: 1066/1830 cut-off events. [2024-06-21 18:14:28,459 INFO L125 PetriNetUnfolderBase]: For 70509/70510 co-relation queries the response was YES. [2024-06-21 18:14:28,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 1830 events. 1066/1830 cut-off events. For 70509/70510 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10269 event pairs, 423 based on Foata normal form. 27/1855 useless extension candidates. Maximal degree in co-relation 8269. Up to 1502 conditions per place. [2024-06-21 18:14:28,470 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 91 selfloop transitions, 29 changer transitions 12/139 dead transitions. [2024-06-21 18:14:28,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 139 transitions, 1250 flow [2024-06-21 18:14:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 18:14:28,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2024-06-21 18:14:28,471 INFO L175 Difference]: Start difference. First operand has 157 places, 116 transitions, 910 flow. Second operand 10 states and 209 transitions. [2024-06-21 18:14:28,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 139 transitions, 1250 flow [2024-06-21 18:14:28,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 139 transitions, 1183 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:28,551 INFO L231 Difference]: Finished difference. Result has 152 places, 112 transitions, 873 flow [2024-06-21 18:14:28,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=873, PETRI_PLACES=152, PETRI_TRANSITIONS=112} [2024-06-21 18:14:28,552 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 18:14:28,552 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 112 transitions, 873 flow [2024-06-21 18:14:28,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:28,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:28,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:28,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 18:14:28,553 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:28,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1304044971, now seen corresponding path program 8 times [2024-06-21 18:14:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:28,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136184336] [2024-06-21 18:14:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:28,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:28,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136184336] [2024-06-21 18:14:28,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136184336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:28,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:28,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235721908] [2024-06-21 18:14:28,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:28,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:28,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:28,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:28,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 112 transitions, 873 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:28,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:28,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:28,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:28,937 INFO L124 PetriNetUnfolderBase]: 937/1617 cut-off events. [2024-06-21 18:14:28,937 INFO L125 PetriNetUnfolderBase]: For 42781/42782 co-relation queries the response was YES. [2024-06-21 18:14:28,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6552 conditions, 1617 events. 937/1617 cut-off events. For 42781/42782 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8880 event pairs, 297 based on Foata normal form. 25/1640 useless extension candidates. Maximal degree in co-relation 6483. Up to 1268 conditions per place. [2024-06-21 18:14:28,946 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 85 selfloop transitions, 25 changer transitions 22/139 dead transitions. [2024-06-21 18:14:28,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 139 transitions, 1237 flow [2024-06-21 18:14:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 18:14:28,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 18:14:28,947 INFO L175 Difference]: Start difference. First operand has 152 places, 112 transitions, 873 flow. Second operand 10 states and 210 transitions. [2024-06-21 18:14:28,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 139 transitions, 1237 flow [2024-06-21 18:14:29,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 139 transitions, 1175 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:29,012 INFO L231 Difference]: Finished difference. Result has 149 places, 107 transitions, 824 flow [2024-06-21 18:14:29,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=824, PETRI_PLACES=149, PETRI_TRANSITIONS=107} [2024-06-21 18:14:29,012 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-21 18:14:29,012 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 107 transitions, 824 flow [2024-06-21 18:14:29,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:29,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:29,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:29,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 18:14:29,013 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:29,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:29,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1058056073, now seen corresponding path program 9 times [2024-06-21 18:14:29,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:29,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237099590] [2024-06-21 18:14:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:29,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:29,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:29,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237099590] [2024-06-21 18:14:29,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237099590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:29,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:29,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:29,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866363859] [2024-06-21 18:14:29,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:29,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:29,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:29,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:29,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 107 transitions, 824 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:29,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:29,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:29,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:29,444 INFO L124 PetriNetUnfolderBase]: 1088/1879 cut-off events. [2024-06-21 18:14:29,444 INFO L125 PetriNetUnfolderBase]: For 70323/70324 co-relation queries the response was YES. [2024-06-21 18:14:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8986 conditions, 1879 events. 1088/1879 cut-off events. For 70323/70324 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10664 event pairs, 321 based on Foata normal form. 19/1896 useless extension candidates. Maximal degree in co-relation 8918. Up to 1050 conditions per place. [2024-06-21 18:14:29,455 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 103 selfloop transitions, 29 changer transitions 15/154 dead transitions. [2024-06-21 18:14:29,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 154 transitions, 1448 flow [2024-06-21 18:14:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 18:14:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 18:14:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-21 18:14:29,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534188034188035 [2024-06-21 18:14:29,456 INFO L175 Difference]: Start difference. First operand has 149 places, 107 transitions, 824 flow. Second operand 12 states and 259 transitions. [2024-06-21 18:14:29,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 154 transitions, 1448 flow [2024-06-21 18:14:29,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 154 transitions, 1374 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:29,528 INFO L231 Difference]: Finished difference. Result has 143 places, 105 transitions, 813 flow [2024-06-21 18:14:29,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=813, PETRI_PLACES=143, PETRI_TRANSITIONS=105} [2024-06-21 18:14:29,529 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-21 18:14:29,529 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 813 flow [2024-06-21 18:14:29,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:29,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:29,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:29,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 18:14:29,530 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:29,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1057757543, now seen corresponding path program 10 times [2024-06-21 18:14:29,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:29,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267257310] [2024-06-21 18:14:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:29,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267257310] [2024-06-21 18:14:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267257310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:29,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:29,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304035697] [2024-06-21 18:14:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:29,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:29,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:29,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:29,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 105 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:29,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:29,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:29,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:29,970 INFO L124 PetriNetUnfolderBase]: 956/1641 cut-off events. [2024-06-21 18:14:29,970 INFO L125 PetriNetUnfolderBase]: For 48521/48522 co-relation queries the response was YES. [2024-06-21 18:14:29,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7449 conditions, 1641 events. 956/1641 cut-off events. For 48521/48522 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9028 event pairs, 309 based on Foata normal form. 19/1658 useless extension candidates. Maximal degree in co-relation 7384. Up to 1050 conditions per place. [2024-06-21 18:14:29,979 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 87 selfloop transitions, 26 changer transitions 18/138 dead transitions. [2024-06-21 18:14:29,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 138 transitions, 1267 flow [2024-06-21 18:14:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-21 18:14:29,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2024-06-21 18:14:29,980 INFO L175 Difference]: Start difference. First operand has 143 places, 105 transitions, 813 flow. Second operand 10 states and 215 transitions. [2024-06-21 18:14:29,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 138 transitions, 1267 flow [2024-06-21 18:14:30,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 1202 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:30,041 INFO L231 Difference]: Finished difference. Result has 140 places, 102 transitions, 789 flow [2024-06-21 18:14:30,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=789, PETRI_PLACES=140, PETRI_TRANSITIONS=102} [2024-06-21 18:14:30,042 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 100 predicate places. [2024-06-21 18:14:30,042 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 102 transitions, 789 flow [2024-06-21 18:14:30,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:30,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:30,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:30,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 18:14:30,043 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:30,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash -877758099, now seen corresponding path program 11 times [2024-06-21 18:14:30,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:30,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448662272] [2024-06-21 18:14:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:30,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:30,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448662272] [2024-06-21 18:14:30,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448662272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:30,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:30,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119379595] [2024-06-21 18:14:30,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:30,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:30,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:30,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:30,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:30,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 102 transitions, 789 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:30,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:30,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:30,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:30,401 INFO L124 PetriNetUnfolderBase]: 1093/1873 cut-off events. [2024-06-21 18:14:30,401 INFO L125 PetriNetUnfolderBase]: For 61716/61716 co-relation queries the response was YES. [2024-06-21 18:14:30,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8963 conditions, 1873 events. 1093/1873 cut-off events. For 61716/61716 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10725 event pairs, 324 based on Foata normal form. 18/1888 useless extension candidates. Maximal degree in co-relation 8899. Up to 849 conditions per place. [2024-06-21 18:14:30,411 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 76 selfloop transitions, 27 changer transitions 22/132 dead transitions. [2024-06-21 18:14:30,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 1236 flow [2024-06-21 18:14:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 18:14:30,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-21 18:14:30,412 INFO L175 Difference]: Start difference. First operand has 140 places, 102 transitions, 789 flow. Second operand 8 states and 178 transitions. [2024-06-21 18:14:30,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 1236 flow [2024-06-21 18:14:30,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 132 transitions, 1172 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:30,470 INFO L231 Difference]: Finished difference. Result has 133 places, 97 transitions, 751 flow [2024-06-21 18:14:30,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=751, PETRI_PLACES=133, PETRI_TRANSITIONS=97} [2024-06-21 18:14:30,470 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-21 18:14:30,470 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 97 transitions, 751 flow [2024-06-21 18:14:30,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:30,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:30,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:30,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:14:30,471 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:30,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:30,471 INFO L85 PathProgramCache]: Analyzing trace with hash 304450701, now seen corresponding path program 12 times [2024-06-21 18:14:30,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:30,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934728041] [2024-06-21 18:14:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:30,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:30,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934728041] [2024-06-21 18:14:30,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934728041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:30,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:30,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:30,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568757475] [2024-06-21 18:14:30,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:30,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:30,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:30,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:30,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:30,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 97 transitions, 751 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:30,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:30,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:30,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:30,851 INFO L124 PetriNetUnfolderBase]: 951/1618 cut-off events. [2024-06-21 18:14:30,851 INFO L125 PetriNetUnfolderBase]: For 46489/46489 co-relation queries the response was YES. [2024-06-21 18:14:30,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7271 conditions, 1618 events. 951/1618 cut-off events. For 46489/46489 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9009 event pairs, 396 based on Foata normal form. 26/1644 useless extension candidates. Maximal degree in co-relation 7209. Up to 1337 conditions per place. [2024-06-21 18:14:30,859 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 69 selfloop transitions, 23 changer transitions 12/111 dead transitions. [2024-06-21 18:14:30,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 111 transitions, 1011 flow [2024-06-21 18:14:30,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 18:14:30,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-06-21 18:14:30,860 INFO L175 Difference]: Start difference. First operand has 133 places, 97 transitions, 751 flow. Second operand 10 states and 197 transitions. [2024-06-21 18:14:30,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 111 transitions, 1011 flow [2024-06-21 18:14:30,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 111 transitions, 944 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:30,941 INFO L231 Difference]: Finished difference. Result has 126 places, 93 transitions, 705 flow [2024-06-21 18:14:30,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=705, PETRI_PLACES=126, PETRI_TRANSITIONS=93} [2024-06-21 18:14:30,942 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-21 18:14:30,942 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 93 transitions, 705 flow [2024-06-21 18:14:30,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:30,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:30,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:30,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:14:30,942 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:30,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1260281521, now seen corresponding path program 6 times [2024-06-21 18:14:30,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:30,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516247077] [2024-06-21 18:14:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:31,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516247077] [2024-06-21 18:14:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516247077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:31,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:31,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:31,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645866414] [2024-06-21 18:14:31,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:31,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:31,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:31,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:31,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 93 transitions, 705 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:31,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:31,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:31,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:31,331 INFO L124 PetriNetUnfolderBase]: 876/1493 cut-off events. [2024-06-21 18:14:31,332 INFO L125 PetriNetUnfolderBase]: For 35387/35387 co-relation queries the response was YES. [2024-06-21 18:14:31,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6586 conditions, 1493 events. 876/1493 cut-off events. For 35387/35387 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8188 event pairs, 322 based on Foata normal form. 24/1517 useless extension candidates. Maximal degree in co-relation 6529. Up to 982 conditions per place. [2024-06-21 18:14:31,339 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 75 selfloop transitions, 20 changer transitions 12/114 dead transitions. [2024-06-21 18:14:31,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 114 transitions, 1067 flow [2024-06-21 18:14:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 18:14:31,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-06-21 18:14:31,340 INFO L175 Difference]: Start difference. First operand has 126 places, 93 transitions, 705 flow. Second operand 10 states and 201 transitions. [2024-06-21 18:14:31,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 114 transitions, 1067 flow [2024-06-21 18:14:31,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 114 transitions, 1013 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:31,365 INFO L231 Difference]: Finished difference. Result has 124 places, 89 transitions, 665 flow [2024-06-21 18:14:31,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=665, PETRI_PLACES=124, PETRI_TRANSITIONS=89} [2024-06-21 18:14:31,366 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 84 predicate places. [2024-06-21 18:14:31,366 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 89 transitions, 665 flow [2024-06-21 18:14:31,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:31,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:31,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:31,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:14:31,368 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:31,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 63353057, now seen corresponding path program 7 times [2024-06-21 18:14:31,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:31,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307500222] [2024-06-21 18:14:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:31,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:31,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:31,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307500222] [2024-06-21 18:14:31,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307500222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:31,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:31,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:31,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645246181] [2024-06-21 18:14:31,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:31,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:31,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:31,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:31,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:31,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 89 transitions, 665 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:31,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:31,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:31,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:31,749 INFO L124 PetriNetUnfolderBase]: 957/1638 cut-off events. [2024-06-21 18:14:31,749 INFO L125 PetriNetUnfolderBase]: For 40877/40877 co-relation queries the response was YES. [2024-06-21 18:14:31,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 1638 events. 957/1638 cut-off events. For 40877/40877 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9201 event pairs, 302 based on Foata normal form. 18/1656 useless extension candidates. Maximal degree in co-relation 7547. Up to 826 conditions per place. [2024-06-21 18:14:31,757 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 77 selfloop transitions, 25 changer transitions 8/117 dead transitions. [2024-06-21 18:14:31,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 117 transitions, 1120 flow [2024-06-21 18:14:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 18:14:31,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-21 18:14:31,758 INFO L175 Difference]: Start difference. First operand has 124 places, 89 transitions, 665 flow. Second operand 10 states and 207 transitions. [2024-06-21 18:14:31,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 117 transitions, 1120 flow [2024-06-21 18:14:31,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 117 transitions, 1065 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:31,817 INFO L231 Difference]: Finished difference. Result has 122 places, 88 transitions, 672 flow [2024-06-21 18:14:31,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=672, PETRI_PLACES=122, PETRI_TRANSITIONS=88} [2024-06-21 18:14:31,818 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 82 predicate places. [2024-06-21 18:14:31,818 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 88 transitions, 672 flow [2024-06-21 18:14:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:31,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:31,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:31,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:14:31,819 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:31,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:31,819 INFO L85 PathProgramCache]: Analyzing trace with hash -437512591, now seen corresponding path program 8 times [2024-06-21 18:14:31,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:31,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242346859] [2024-06-21 18:14:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:31,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:31,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:31,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242346859] [2024-06-21 18:14:31,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242346859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:31,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:31,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:31,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037352101] [2024-06-21 18:14:31,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:31,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:31,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:31,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:32,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:32,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 88 transitions, 672 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:32,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:32,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:32,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:32,248 INFO L124 PetriNetUnfolderBase]: 920/1577 cut-off events. [2024-06-21 18:14:32,249 INFO L125 PetriNetUnfolderBase]: For 36131/36131 co-relation queries the response was YES. [2024-06-21 18:14:32,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7176 conditions, 1577 events. 920/1577 cut-off events. For 36131/36131 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8835 event pairs, 377 based on Foata normal form. 24/1601 useless extension candidates. Maximal degree in co-relation 7121. Up to 1033 conditions per place. [2024-06-21 18:14:32,256 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 72 selfloop transitions, 19 changer transitions 10/108 dead transitions. [2024-06-21 18:14:32,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 108 transitions, 1014 flow [2024-06-21 18:14:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 18:14:32,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242165242165242 [2024-06-21 18:14:32,257 INFO L175 Difference]: Start difference. First operand has 122 places, 88 transitions, 672 flow. Second operand 9 states and 184 transitions. [2024-06-21 18:14:32,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 108 transitions, 1014 flow [2024-06-21 18:14:32,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 108 transitions, 958 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:32,281 INFO L231 Difference]: Finished difference. Result has 121 places, 85 transitions, 631 flow [2024-06-21 18:14:32,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=631, PETRI_PLACES=121, PETRI_TRANSITIONS=85} [2024-06-21 18:14:32,282 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 81 predicate places. [2024-06-21 18:14:32,282 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 85 transitions, 631 flow [2024-06-21 18:14:32,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:32,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:32,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:32,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:14:32,282 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:32,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 52068437, now seen corresponding path program 9 times [2024-06-21 18:14:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:32,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130780872] [2024-06-21 18:14:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:32,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:32,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130780872] [2024-06-21 18:14:32,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130780872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:32,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:32,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:32,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784277455] [2024-06-21 18:14:32,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:32,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:32,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:32,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:32,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 85 transitions, 631 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:32,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:32,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:32,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:32,615 INFO L124 PetriNetUnfolderBase]: 769/1330 cut-off events. [2024-06-21 18:14:32,616 INFO L125 PetriNetUnfolderBase]: For 26931/26931 co-relation queries the response was YES. [2024-06-21 18:14:32,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5623 conditions, 1330 events. 769/1330 cut-off events. For 26931/26931 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7132 event pairs, 348 based on Foata normal form. 26/1356 useless extension candidates. Maximal degree in co-relation 5569. Up to 1065 conditions per place. [2024-06-21 18:14:32,621 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 64 selfloop transitions, 13 changer transitions 13/97 dead transitions. [2024-06-21 18:14:32,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 97 transitions, 859 flow [2024-06-21 18:14:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 18:14:32,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-21 18:14:32,622 INFO L175 Difference]: Start difference. First operand has 121 places, 85 transitions, 631 flow. Second operand 8 states and 160 transitions. [2024-06-21 18:14:32,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 97 transitions, 859 flow [2024-06-21 18:14:32,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 97 transitions, 812 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:32,644 INFO L231 Difference]: Finished difference. Result has 118 places, 80 transitions, 573 flow [2024-06-21 18:14:32,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=573, PETRI_PLACES=118, PETRI_TRANSITIONS=80} [2024-06-21 18:14:32,645 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2024-06-21 18:14:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 80 transitions, 573 flow [2024-06-21 18:14:32,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:32,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:32,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:32,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:14:32,646 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:32,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 63347477, now seen corresponding path program 10 times [2024-06-21 18:14:32,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:32,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855061025] [2024-06-21 18:14:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:32,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:32,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855061025] [2024-06-21 18:14:32,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855061025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:32,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:32,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:32,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582236305] [2024-06-21 18:14:32,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:32,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:32,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:32,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:32,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 80 transitions, 573 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:32,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:32,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:32,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:32,959 INFO L124 PetriNetUnfolderBase]: 652/1129 cut-off events. [2024-06-21 18:14:32,959 INFO L125 PetriNetUnfolderBase]: For 17435/17435 co-relation queries the response was YES. [2024-06-21 18:14:32,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 1129 events. 652/1129 cut-off events. For 17435/17435 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5823 event pairs, 195 based on Foata normal form. 18/1147 useless extension candidates. Maximal degree in co-relation 4391. Up to 826 conditions per place. [2024-06-21 18:14:32,964 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 66 selfloop transitions, 15 changer transitions 11/99 dead transitions. [2024-06-21 18:14:32,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 99 transitions, 835 flow [2024-06-21 18:14:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:14:32,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156695156695157 [2024-06-21 18:14:32,965 INFO L175 Difference]: Start difference. First operand has 118 places, 80 transitions, 573 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:14:32,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 99 transitions, 835 flow [2024-06-21 18:14:32,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 99 transitions, 801 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:32,983 INFO L231 Difference]: Finished difference. Result has 115 places, 75 transitions, 534 flow [2024-06-21 18:14:32,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=534, PETRI_PLACES=115, PETRI_TRANSITIONS=75} [2024-06-21 18:14:32,984 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-21 18:14:32,984 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 75 transitions, 534 flow [2024-06-21 18:14:32,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:32,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:32,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:32,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 18:14:32,984 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:32,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash -9041131, now seen corresponding path program 11 times [2024-06-21 18:14:32,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:32,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375414603] [2024-06-21 18:14:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:32,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:33,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:33,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375414603] [2024-06-21 18:14:33,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375414603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:33,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:33,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:33,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389597734] [2024-06-21 18:14:33,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:33,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:33,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:33,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:33,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:33,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:33,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 75 transitions, 534 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:33,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:33,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:33,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:33,333 INFO L124 PetriNetUnfolderBase]: 724/1261 cut-off events. [2024-06-21 18:14:33,333 INFO L125 PetriNetUnfolderBase]: For 22053/22053 co-relation queries the response was YES. [2024-06-21 18:14:33,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5249 conditions, 1261 events. 724/1261 cut-off events. For 22053/22053 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6708 event pairs, 100 based on Foata normal form. 18/1279 useless extension candidates. Maximal degree in co-relation 5197. Up to 734 conditions per place. [2024-06-21 18:14:33,339 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 70 selfloop transitions, 22 changer transitions 8/107 dead transitions. [2024-06-21 18:14:33,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 107 transitions, 915 flow [2024-06-21 18:14:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:14:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:14:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-21 18:14:33,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221445221445221 [2024-06-21 18:14:33,340 INFO L175 Difference]: Start difference. First operand has 115 places, 75 transitions, 534 flow. Second operand 11 states and 224 transitions. [2024-06-21 18:14:33,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 107 transitions, 915 flow [2024-06-21 18:14:33,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 859 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 18:14:33,357 INFO L231 Difference]: Finished difference. Result has 112 places, 74 transitions, 522 flow [2024-06-21 18:14:33,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=522, PETRI_PLACES=112, PETRI_TRANSITIONS=74} [2024-06-21 18:14:33,357 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-06-21 18:14:33,357 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 74 transitions, 522 flow [2024-06-21 18:14:33,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:33,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:33,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:33,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 18:14:33,358 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:33,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:33,358 INFO L85 PathProgramCache]: Analyzing trace with hash -9035551, now seen corresponding path program 12 times [2024-06-21 18:14:33,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:33,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578487895] [2024-06-21 18:14:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:33,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:33,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:33,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578487895] [2024-06-21 18:14:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578487895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:33,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:33,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:33,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983704096] [2024-06-21 18:14:33,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:33,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:33,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:33,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:33,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:33,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:33,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 74 transitions, 522 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:33,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:33,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:33,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:33,691 INFO L124 PetriNetUnfolderBase]: 619/1074 cut-off events. [2024-06-21 18:14:33,692 INFO L125 PetriNetUnfolderBase]: For 15981/15981 co-relation queries the response was YES. [2024-06-21 18:14:33,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 1074 events. 619/1074 cut-off events. For 15981/15981 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5466 event pairs, 88 based on Foata normal form. 18/1092 useless extension candidates. Maximal degree in co-relation 4223. Up to 734 conditions per place. [2024-06-21 18:14:33,698 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 58 selfloop transitions, 18 changer transitions 13/96 dead transitions. [2024-06-21 18:14:33,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 96 transitions, 792 flow [2024-06-21 18:14:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 18:14:33,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270655270655271 [2024-06-21 18:14:33,700 INFO L175 Difference]: Start difference. First operand has 112 places, 74 transitions, 522 flow. Second operand 9 states and 185 transitions. [2024-06-21 18:14:33,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 96 transitions, 792 flow [2024-06-21 18:14:33,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 96 transitions, 744 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:33,715 INFO L231 Difference]: Finished difference. Result has 110 places, 71 transitions, 489 flow [2024-06-21 18:14:33,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=489, PETRI_PLACES=110, PETRI_TRANSITIONS=71} [2024-06-21 18:14:33,716 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-06-21 18:14:33,716 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 71 transitions, 489 flow [2024-06-21 18:14:33,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:33,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:33,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:33,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 18:14:33,717 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:33,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1683901, now seen corresponding path program 13 times [2024-06-21 18:14:33,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:33,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118928977] [2024-06-21 18:14:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:33,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:33,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:33,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118928977] [2024-06-21 18:14:33,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118928977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:33,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:33,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:33,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219994956] [2024-06-21 18:14:33,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:33,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:33,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:33,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 71 transitions, 489 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:33,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:33,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:33,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:33,969 INFO L124 PetriNetUnfolderBase]: 611/1060 cut-off events. [2024-06-21 18:14:33,969 INFO L125 PetriNetUnfolderBase]: For 15917/15917 co-relation queries the response was YES. [2024-06-21 18:14:33,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4182 conditions, 1060 events. 611/1060 cut-off events. For 15917/15917 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5367 event pairs, 63 based on Foata normal form. 18/1076 useless extension candidates. Maximal degree in co-relation 4133. Up to 698 conditions per place. [2024-06-21 18:14:33,973 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 52 selfloop transitions, 13 changer transitions 21/93 dead transitions. [2024-06-21 18:14:33,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 756 flow [2024-06-21 18:14:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:14:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:14:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 18:14:33,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-21 18:14:33,974 INFO L175 Difference]: Start difference. First operand has 110 places, 71 transitions, 489 flow. Second operand 8 states and 167 transitions. [2024-06-21 18:14:33,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 756 flow [2024-06-21 18:14:33,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 710 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:33,991 INFO L231 Difference]: Finished difference. Result has 105 places, 65 transitions, 431 flow [2024-06-21 18:14:33,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=431, PETRI_PLACES=105, PETRI_TRANSITIONS=65} [2024-06-21 18:14:33,991 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-21 18:14:33,991 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 65 transitions, 431 flow [2024-06-21 18:14:33,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:33,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:33,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:33,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 18:14:33,992 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:33,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1806420653, now seen corresponding path program 14 times [2024-06-21 18:14:33,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:33,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016865263] [2024-06-21 18:14:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:33,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:34,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:34,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016865263] [2024-06-21 18:14:34,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016865263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:34,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:34,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:34,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007737306] [2024-06-21 18:14:34,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:34,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:34,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:34,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:34,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 65 transitions, 431 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:34,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:34,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:34,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:34,276 INFO L124 PetriNetUnfolderBase]: 659/1148 cut-off events. [2024-06-21 18:14:34,276 INFO L125 PetriNetUnfolderBase]: For 23955/23955 co-relation queries the response was YES. [2024-06-21 18:14:34,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 1148 events. 659/1148 cut-off events. For 23955/23955 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6057 event pairs, 272 based on Foata normal form. 24/1172 useless extension candidates. Maximal degree in co-relation 4811. Up to 576 conditions per place. [2024-06-21 18:14:34,281 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 54 selfloop transitions, 12 changer transitions 16/89 dead transitions. [2024-06-21 18:14:34,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 89 transitions, 749 flow [2024-06-21 18:14:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 18:14:34,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-21 18:14:34,282 INFO L175 Difference]: Start difference. First operand has 105 places, 65 transitions, 431 flow. Second operand 10 states and 200 transitions. [2024-06-21 18:14:34,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 89 transitions, 749 flow [2024-06-21 18:14:34,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 89 transitions, 685 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 18:14:34,294 INFO L231 Difference]: Finished difference. Result has 99 places, 61 transitions, 369 flow [2024-06-21 18:14:34,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=369, PETRI_PLACES=99, PETRI_TRANSITIONS=61} [2024-06-21 18:14:34,294 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-21 18:14:34,294 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 61 transitions, 369 flow [2024-06-21 18:14:34,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:34,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:34,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:34,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 18:14:34,295 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:34,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash 727799943, now seen corresponding path program 15 times [2024-06-21 18:14:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:34,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956468150] [2024-06-21 18:14:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:34,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:34,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:34,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956468150] [2024-06-21 18:14:34,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956468150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:34,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:34,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876606858] [2024-06-21 18:14:34,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:34,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:34,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:34,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:34,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 61 transitions, 369 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:34,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:34,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:34,606 INFO L124 PetriNetUnfolderBase]: 660/1157 cut-off events. [2024-06-21 18:14:34,606 INFO L125 PetriNetUnfolderBase]: For 27434/27434 co-relation queries the response was YES. [2024-06-21 18:14:34,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5159 conditions, 1157 events. 660/1157 cut-off events. For 27434/27434 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6219 event pairs, 262 based on Foata normal form. 18/1173 useless extension candidates. Maximal degree in co-relation 5115. Up to 758 conditions per place. [2024-06-21 18:14:34,612 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 59 selfloop transitions, 9 changer transitions 8/83 dead transitions. [2024-06-21 18:14:34,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 83 transitions, 655 flow [2024-06-21 18:14:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 18:14:34,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50997150997151 [2024-06-21 18:14:34,613 INFO L175 Difference]: Start difference. First operand has 99 places, 61 transitions, 369 flow. Second operand 9 states and 179 transitions. [2024-06-21 18:14:34,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 83 transitions, 655 flow [2024-06-21 18:14:34,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 83 transitions, 624 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:34,629 INFO L231 Difference]: Finished difference. Result has 95 places, 59 transitions, 354 flow [2024-06-21 18:14:34,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=354, PETRI_PLACES=95, PETRI_TRANSITIONS=59} [2024-06-21 18:14:34,629 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2024-06-21 18:14:34,629 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 59 transitions, 354 flow [2024-06-21 18:14:34,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:34,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:34,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 18:14:34,630 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:34,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 128542973, now seen corresponding path program 16 times [2024-06-21 18:14:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:34,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392768994] [2024-06-21 18:14:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:34,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:34,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392768994] [2024-06-21 18:14:34,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392768994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:34,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:34,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131371188] [2024-06-21 18:14:34,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:34,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:34,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:34,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:34,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 59 transitions, 354 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:34,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:34,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:34,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:34,911 INFO L124 PetriNetUnfolderBase]: 555/972 cut-off events. [2024-06-21 18:14:34,912 INFO L125 PetriNetUnfolderBase]: For 18416/18416 co-relation queries the response was YES. [2024-06-21 18:14:34,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4089 conditions, 972 events. 555/972 cut-off events. For 18416/18416 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4966 event pairs, 252 based on Foata normal form. 18/988 useless extension candidates. Maximal degree in co-relation 4047. Up to 758 conditions per place. [2024-06-21 18:14:34,915 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 47 selfloop transitions, 7 changer transitions 15/76 dead transitions. [2024-06-21 18:14:34,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 76 transitions, 550 flow [2024-06-21 18:14:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:14:34,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928774928774929 [2024-06-21 18:14:34,916 INFO L175 Difference]: Start difference. First operand has 95 places, 59 transitions, 354 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:14:34,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 76 transitions, 550 flow [2024-06-21 18:14:34,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 76 transitions, 529 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:34,926 INFO L231 Difference]: Finished difference. Result has 94 places, 56 transitions, 335 flow [2024-06-21 18:14:34,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=335, PETRI_PLACES=94, PETRI_TRANSITIONS=56} [2024-06-21 18:14:34,927 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-21 18:14:34,927 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 56 transitions, 335 flow [2024-06-21 18:14:34,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:34,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:34,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:34,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 18:14:34,927 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:34,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1839340639, now seen corresponding path program 17 times [2024-06-21 18:14:34,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:34,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183278419] [2024-06-21 18:14:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:35,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:35,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183278419] [2024-06-21 18:14:35,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183278419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:35,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:35,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:35,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333130111] [2024-06-21 18:14:35,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:35,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:35,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:35,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 56 transitions, 335 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:35,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:35,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:35,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:35,210 INFO L124 PetriNetUnfolderBase]: 527/922 cut-off events. [2024-06-21 18:14:35,211 INFO L125 PetriNetUnfolderBase]: For 16922/16922 co-relation queries the response was YES. [2024-06-21 18:14:35,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3886 conditions, 922 events. 527/922 cut-off events. For 16922/16922 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4599 event pairs, 234 based on Foata normal form. 18/940 useless extension candidates. Maximal degree in co-relation 3845. Up to 422 conditions per place. [2024-06-21 18:14:35,215 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 46 selfloop transitions, 10 changer transitions 18/81 dead transitions. [2024-06-21 18:14:35,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 81 transitions, 625 flow [2024-06-21 18:14:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 18:14:35,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-06-21 18:14:35,216 INFO L175 Difference]: Start difference. First operand has 94 places, 56 transitions, 335 flow. Second operand 10 states and 201 transitions. [2024-06-21 18:14:35,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 81 transitions, 625 flow [2024-06-21 18:14:35,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 81 transitions, 603 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:14:35,225 INFO L231 Difference]: Finished difference. Result has 91 places, 52 transitions, 315 flow [2024-06-21 18:14:35,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=315, PETRI_PLACES=91, PETRI_TRANSITIONS=52} [2024-06-21 18:14:35,226 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-06-21 18:14:35,226 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 52 transitions, 315 flow [2024-06-21 18:14:35,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:35,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:35,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:35,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 18:14:35,226 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:35,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash 297059575, now seen corresponding path program 18 times [2024-06-21 18:14:35,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:35,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132625896] [2024-06-21 18:14:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:35,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:35,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:35,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132625896] [2024-06-21 18:14:35,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132625896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:35,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:35,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:35,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503824154] [2024-06-21 18:14:35,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:35,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:35,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:35,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 52 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:35,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:35,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:35,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:35,507 INFO L124 PetriNetUnfolderBase]: 501/874 cut-off events. [2024-06-21 18:14:35,507 INFO L125 PetriNetUnfolderBase]: For 17008/17008 co-relation queries the response was YES. [2024-06-21 18:14:35,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3733 conditions, 874 events. 501/874 cut-off events. For 17008/17008 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4307 event pairs, 222 based on Foata normal form. 24/898 useless extension candidates. Maximal degree in co-relation 3693. Up to 422 conditions per place. [2024-06-21 18:14:35,510 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 45 selfloop transitions, 10 changer transitions 10/72 dead transitions. [2024-06-21 18:14:35,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 72 transitions, 567 flow [2024-06-21 18:14:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:14:35,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948717948717949 [2024-06-21 18:14:35,511 INFO L175 Difference]: Start difference. First operand has 91 places, 52 transitions, 315 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:14:35,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 72 transitions, 567 flow [2024-06-21 18:14:35,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 72 transitions, 536 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:35,517 INFO L231 Difference]: Finished difference. Result has 86 places, 49 transitions, 291 flow [2024-06-21 18:14:35,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=291, PETRI_PLACES=86, PETRI_TRANSITIONS=49} [2024-06-21 18:14:35,518 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-21 18:14:35,518 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 49 transitions, 291 flow [2024-06-21 18:14:35,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:35,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:35,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:35,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 18:14:35,519 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:35,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash -790490241, now seen corresponding path program 19 times [2024-06-21 18:14:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:35,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491868814] [2024-06-21 18:14:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:35,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:35,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:35,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491868814] [2024-06-21 18:14:35,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491868814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:35,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:35,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344117922] [2024-06-21 18:14:35,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:35,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:35,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:35,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:35,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 49 transitions, 291 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:35,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:35,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:35,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:35,761 INFO L124 PetriNetUnfolderBase]: 350/617 cut-off events. [2024-06-21 18:14:35,761 INFO L125 PetriNetUnfolderBase]: For 8406/8406 co-relation queries the response was YES. [2024-06-21 18:14:35,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 617 events. 350/617 cut-off events. For 8406/8406 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2757 event pairs, 177 based on Foata normal form. 26/643 useless extension candidates. Maximal degree in co-relation 2265. Up to 422 conditions per place. [2024-06-21 18:14:35,763 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 33 selfloop transitions, 3 changer transitions 18/61 dead transitions. [2024-06-21 18:14:35,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 61 transitions, 439 flow [2024-06-21 18:14:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 18:14:35,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2024-06-21 18:14:35,764 INFO L175 Difference]: Start difference. First operand has 86 places, 49 transitions, 291 flow. Second operand 9 states and 168 transitions. [2024-06-21 18:14:35,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 61 transitions, 439 flow [2024-06-21 18:14:35,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 61 transitions, 418 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:14:35,769 INFO L231 Difference]: Finished difference. Result has 84 places, 41 transitions, 217 flow [2024-06-21 18:14:35,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=217, PETRI_PLACES=84, PETRI_TRANSITIONS=41} [2024-06-21 18:14:35,769 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 44 predicate places. [2024-06-21 18:14:35,769 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 41 transitions, 217 flow [2024-06-21 18:14:35,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:35,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:35,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:35,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 18:14:35,770 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:35,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1559041631, now seen corresponding path program 20 times [2024-06-21 18:14:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390207562] [2024-06-21 18:14:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:35,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:35,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390207562] [2024-06-21 18:14:35,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390207562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:35,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:35,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:35,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583387943] [2024-06-21 18:14:35,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:35,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:35,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:35,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:35,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:35,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:35,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 41 transitions, 217 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:35,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:35,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:35,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:36,083 INFO L124 PetriNetUnfolderBase]: 413/746 cut-off events. [2024-06-21 18:14:36,083 INFO L125 PetriNetUnfolderBase]: For 9084/9084 co-relation queries the response was YES. [2024-06-21 18:14:36,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 746 events. 413/746 cut-off events. For 9084/9084 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3649 event pairs, 78 based on Foata normal form. 18/764 useless extension candidates. Maximal degree in co-relation 2813. Up to 320 conditions per place. [2024-06-21 18:14:36,086 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 43 selfloop transitions, 13 changer transitions 8/71 dead transitions. [2024-06-21 18:14:36,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 490 flow [2024-06-21 18:14:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:14:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:14:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-21 18:14:36,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034965034965035 [2024-06-21 18:14:36,087 INFO L175 Difference]: Start difference. First operand has 84 places, 41 transitions, 217 flow. Second operand 11 states and 216 transitions. [2024-06-21 18:14:36,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 490 flow [2024-06-21 18:14:36,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 440 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 18:14:36,091 INFO L231 Difference]: Finished difference. Result has 73 places, 40 transitions, 215 flow [2024-06-21 18:14:36,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=215, PETRI_PLACES=73, PETRI_TRANSITIONS=40} [2024-06-21 18:14:36,092 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-06-21 18:14:36,092 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 40 transitions, 215 flow [2024-06-21 18:14:36,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:36,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:36,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:36,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 18:14:36,092 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:36,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:36,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1559047211, now seen corresponding path program 21 times [2024-06-21 18:14:36,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:36,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579412963] [2024-06-21 18:14:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:36,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:36,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:36,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579412963] [2024-06-21 18:14:36,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579412963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:36,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:36,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:36,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526133165] [2024-06-21 18:14:36,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:36,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:36,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:36,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:36,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:36,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:36,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 40 transitions, 215 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:36,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:36,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:36,365 INFO L124 PetriNetUnfolderBase]: 308/559 cut-off events. [2024-06-21 18:14:36,365 INFO L125 PetriNetUnfolderBase]: For 3750/3750 co-relation queries the response was YES. [2024-06-21 18:14:36,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 559 events. 308/559 cut-off events. For 3750/3750 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2480 event pairs, 66 based on Foata normal form. 18/577 useless extension candidates. Maximal degree in co-relation 1859. Up to 320 conditions per place. [2024-06-21 18:14:36,367 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 30 selfloop transitions, 10 changer transitions 15/62 dead transitions. [2024-06-21 18:14:36,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 62 transitions, 393 flow [2024-06-21 18:14:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:14:36,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948717948717949 [2024-06-21 18:14:36,368 INFO L175 Difference]: Start difference. First operand has 73 places, 40 transitions, 215 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:14:36,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 62 transitions, 393 flow [2024-06-21 18:14:36,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 363 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:36,370 INFO L231 Difference]: Finished difference. Result has 72 places, 37 transitions, 191 flow [2024-06-21 18:14:36,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=191, PETRI_PLACES=72, PETRI_TRANSITIONS=37} [2024-06-21 18:14:36,371 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-06-21 18:14:36,371 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 37 transitions, 191 flow [2024-06-21 18:14:36,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:36,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:36,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:36,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 18:14:36,371 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:36,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:36,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1727280067, now seen corresponding path program 22 times [2024-06-21 18:14:36,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:36,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985738547] [2024-06-21 18:14:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:36,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:36,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:36,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985738547] [2024-06-21 18:14:36,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985738547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:36,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:36,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:14:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191585377] [2024-06-21 18:14:36,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:36,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:14:36,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:14:36,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:14:36,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:36,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 37 transitions, 191 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:36,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:36,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:36,623 INFO L124 PetriNetUnfolderBase]: 361/657 cut-off events. [2024-06-21 18:14:36,623 INFO L125 PetriNetUnfolderBase]: For 5382/5382 co-relation queries the response was YES. [2024-06-21 18:14:36,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2339 conditions, 657 events. 361/657 cut-off events. For 5382/5382 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3099 event pairs, 71 based on Foata normal form. 18/674 useless extension candidates. Maximal degree in co-relation 2310. Up to 204 conditions per place. [2024-06-21 18:14:36,625 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 38 selfloop transitions, 8 changer transitions 14/67 dead transitions. [2024-06-21 18:14:36,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 439 flow [2024-06-21 18:14:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:14:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:14:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 18:14:36,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102564102564102 [2024-06-21 18:14:36,626 INFO L175 Difference]: Start difference. First operand has 72 places, 37 transitions, 191 flow. Second operand 10 states and 199 transitions. [2024-06-21 18:14:36,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 439 flow [2024-06-21 18:14:36,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 411 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:14:36,628 INFO L231 Difference]: Finished difference. Result has 68 places, 33 transitions, 165 flow [2024-06-21 18:14:36,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=165, PETRI_PLACES=68, PETRI_TRANSITIONS=33} [2024-06-21 18:14:36,629 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 28 predicate places. [2024-06-21 18:14:36,629 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 33 transitions, 165 flow [2024-06-21 18:14:36,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:36,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:36,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:36,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 18:14:36,629 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:36,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:36,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1257789237, now seen corresponding path program 23 times [2024-06-21 18:14:36,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:36,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787415094] [2024-06-21 18:14:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:36,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:36,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:36,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787415094] [2024-06-21 18:14:36,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787415094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:36,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:36,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901659507] [2024-06-21 18:14:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:36,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:36,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:36,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:36,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 33 transitions, 165 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:36,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:36,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:36,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:36,902 INFO L124 PetriNetUnfolderBase]: 232/435 cut-off events. [2024-06-21 18:14:36,902 INFO L125 PetriNetUnfolderBase]: For 3066/3066 co-relation queries the response was YES. [2024-06-21 18:14:36,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 435 events. 232/435 cut-off events. For 3066/3066 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1821 event pairs, 12 based on Foata normal form. 18/453 useless extension candidates. Maximal degree in co-relation 1439. Up to 159 conditions per place. [2024-06-21 18:14:36,903 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 29 selfloop transitions, 8 changer transitions 13/57 dead transitions. [2024-06-21 18:14:36,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 57 transitions, 343 flow [2024-06-21 18:14:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:14:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:14:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 18:14:36,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755244755244755 [2024-06-21 18:14:36,904 INFO L175 Difference]: Start difference. First operand has 68 places, 33 transitions, 165 flow. Second operand 11 states and 204 transitions. [2024-06-21 18:14:36,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 57 transitions, 343 flow [2024-06-21 18:14:36,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 315 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:36,906 INFO L231 Difference]: Finished difference. Result has 64 places, 30 transitions, 144 flow [2024-06-21 18:14:36,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=144, PETRI_PLACES=64, PETRI_TRANSITIONS=30} [2024-06-21 18:14:36,907 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2024-06-21 18:14:36,907 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 30 transitions, 144 flow [2024-06-21 18:14:36,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:36,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:36,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:36,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 18:14:36,908 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:36,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash -118170029, now seen corresponding path program 24 times [2024-06-21 18:14:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:36,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353674571] [2024-06-21 18:14:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:37,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:37,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353674571] [2024-06-21 18:14:37,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353674571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:37,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:37,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:37,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325989513] [2024-06-21 18:14:37,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:37,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:37,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:37,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:37,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:37,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 30 transitions, 144 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:37,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:37,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:37,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:37,188 INFO L124 PetriNetUnfolderBase]: 188/363 cut-off events. [2024-06-21 18:14:37,189 INFO L125 PetriNetUnfolderBase]: For 2132/2140 co-relation queries the response was YES. [2024-06-21 18:14:37,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 363 events. 188/363 cut-off events. For 2132/2140 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1489 event pairs, 12 based on Foata normal form. 18/381 useless extension candidates. Maximal degree in co-relation 1181. Up to 147 conditions per place. [2024-06-21 18:14:37,190 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 26 selfloop transitions, 7 changer transitions 12/52 dead transitions. [2024-06-21 18:14:37,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 52 transitions, 298 flow [2024-06-21 18:14:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:14:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:14:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 18:14:37,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662004662004662 [2024-06-21 18:14:37,191 INFO L175 Difference]: Start difference. First operand has 64 places, 30 transitions, 144 flow. Second operand 11 states and 200 transitions. [2024-06-21 18:14:37,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 52 transitions, 298 flow [2024-06-21 18:14:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 52 transitions, 278 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:14:37,192 INFO L231 Difference]: Finished difference. Result has 61 places, 28 transitions, 128 flow [2024-06-21 18:14:37,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=128, PETRI_PLACES=61, PETRI_TRANSITIONS=28} [2024-06-21 18:14:37,193 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2024-06-21 18:14:37,193 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 28 transitions, 128 flow [2024-06-21 18:14:37,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:37,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:14:37,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:37,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 18:14:37,193 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:14:37,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:14:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1539810261, now seen corresponding path program 25 times [2024-06-21 18:14:37,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:14:37,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299022492] [2024-06-21 18:14:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:14:37,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:14:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:14:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:14:37,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:14:37,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299022492] [2024-06-21 18:14:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299022492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:14:37,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:14:37,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:14:37,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539874898] [2024-06-21 18:14:37,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:14:37,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:14:37,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:14:37,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:14:37,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:14:37,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-21 18:14:37,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 28 transitions, 128 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:37,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:14:37,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-21 18:14:37,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:14:37,444 INFO L124 PetriNetUnfolderBase]: 83/176 cut-off events. [2024-06-21 18:14:37,445 INFO L125 PetriNetUnfolderBase]: For 750/750 co-relation queries the response was YES. [2024-06-21 18:14:37,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 176 events. 83/176 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 518 event pairs, 0 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 510. Up to 96 conditions per place. [2024-06-21 18:14:37,445 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-21 18:14:37,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 39 transitions, 204 flow [2024-06-21 18:14:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:14:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:14:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 18:14:37,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2024-06-21 18:14:37,446 INFO L175 Difference]: Start difference. First operand has 61 places, 28 transitions, 128 flow. Second operand 9 states and 159 transitions. [2024-06-21 18:14:37,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 39 transitions, 204 flow [2024-06-21 18:14:37,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 39 transitions, 171 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-21 18:14:37,447 INFO L231 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2024-06-21 18:14:37,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2024-06-21 18:14:37,447 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-06-21 18:14:37,448 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2024-06-21 18:14:37,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:14:37,450 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 18:14:37,450 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 18:14:37,450 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 18:14:37,451 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 18:14:37,451 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 18:14:37,451 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 18:14:37,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 18:14:37,451 INFO L445 BasicCegarLoop]: Path program histogram: [25, 15, 12, 9, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:14:37,454 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 18:14:37,454 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 18:14:37,457 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 18:14:37,457 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 18:14:37,458 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 06:14:37 BasicIcfg [2024-06-21 18:14:37,458 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 18:14:37,458 INFO L158 Benchmark]: Toolchain (without parser) took 92276.00ms. Allocated memory was 172.0MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 94.8MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 747.9MB. Max. memory is 16.1GB. [2024-06-21 18:14:37,458 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 172.0MB. Free memory is still 141.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:14:37,459 INFO L158 Benchmark]: Witness Parser took 4.54ms. Allocated memory is still 172.0MB. Free memory is still 97.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:14:37,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 485.69ms. Allocated memory is still 172.0MB. Free memory was 94.6MB in the beginning and 69.0MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 18:14:37,459 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.07ms. Allocated memory is still 172.0MB. Free memory was 69.0MB in the beginning and 66.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:14:37,459 INFO L158 Benchmark]: Boogie Preprocessor took 52.73ms. Allocated memory is still 172.0MB. Free memory was 66.9MB in the beginning and 64.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:14:37,459 INFO L158 Benchmark]: RCFGBuilder took 570.53ms. Allocated memory was 172.0MB in the beginning and 211.8MB in the end (delta: 39.8MB). Free memory was 64.7MB in the beginning and 163.1MB in the end (delta: -98.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-21 18:14:37,459 INFO L158 Benchmark]: TraceAbstraction took 91096.59ms. Allocated memory was 211.8MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 162.1MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 775.2MB. Max. memory is 16.1GB. [2024-06-21 18:14:37,460 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 172.0MB. Free memory is still 141.2MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 4.54ms. Allocated memory is still 172.0MB. Free memory is still 97.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 485.69ms. Allocated memory is still 172.0MB. Free memory was 94.6MB in the beginning and 69.0MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.07ms. Allocated memory is still 172.0MB. Free memory was 69.0MB in the beginning and 66.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.73ms. Allocated memory is still 172.0MB. Free memory was 66.9MB in the beginning and 64.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 570.53ms. Allocated memory was 172.0MB in the beginning and 211.8MB in the end (delta: 39.8MB). Free memory was 64.7MB in the beginning and 163.1MB in the end (delta: -98.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 91096.59ms. Allocated memory was 211.8MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 162.1MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 775.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 90.9s, OverallIterations: 133, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 75.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9457 SdHoareTripleChecker+Valid, 16.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7731 mSDsluCounter, 3004 SdHoareTripleChecker+Invalid, 12.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1998 mSDsCounter, 1436 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34288 IncrementalHoareTripleChecker+Invalid, 35724 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1436 mSolverCounterUnsat, 1006 mSDtfsCounter, 34288 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1159 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 1041 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2241occurred in iteration=62, InterpolantAutomatonStates: 1056, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 2438 NumberOfCodeBlocks, 2438 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 2305 ConstructedInterpolants, 0 QuantifiedInterpolants, 22241 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 133 InterpolantComputations, 133 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 18:14:37,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE